Consistency Update: user/markdown.md

Fix tables, version history and remove inline tier badge

doc/user/markdown.md

@@ -68,10 +68,10 @@ Features not found in standard Markdown:
 Features [extended from standard Markdown](#features-extended-from-standard-markdown):
 
 | Standard Markdown                     | Extended Markdown in GitLab                                                           |
-| ------------------------------------- | ------------------------- |
+|---------------------------------------|---------------------------------------------------------------------------------------|
 | [blockquotes](#blockquotes)           | [multi-line blockquotes](#multiline-blockquote)                                       |
 | [code blocks](#code-spans-and-blocks) | [colored code and syntax highlighting](#colored-code-and-syntax-highlighting)         |
-| [emphasis](#emphasis)                 | [multiple underscores in words](#multiple-underscores-in-words-and-mid-word-emphasis)
+| [emphasis](#emphasis)                 | [multiple underscores in words](#multiple-underscores-in-words-and-mid-word-emphasis) |
 | [headers](#headers)                   | [linkable Header IDs](#header-ids-and-links)                                          |
 | [images](#images)                     | [embedded videos](#videos) and [audio](#audio)                                        |
 | [line breaks](#line-breaks)           | [more line break control](#newlines)                                                  |
@@ -516,7 +516,7 @@ version to reference other projects from the same namespace.
 GitLab Flavored Markdown recognizes the following:
 
 | references                                                                  | input                         | cross-project reference                 | shortcut inside same namespace |
-| :--------------------------------------------------- | :---------------------------- | :----------------------------------------- | :------------------------------- |
+|:----------------------------------------------------------------------------|:------------------------------|:----------------------------------------|:-------------------------------|
 | specific user                                                               | `@user_name`                  |                                         |                                |
 | specific group                                                              | `@group_name`                 |                                         |                                |
 | entire team                                                                 | `@all`                        |                                         |                                |
@@ -525,7 +525,7 @@ GitLab Flavored Markdown recognizes the following:
 | merge request                                                               | `!123`                        | `namespace/project!123`                 | `project!123`                  |
 | snippet                                                                     | `$123`                        | `namespace/project$123`                 | `project$123`                  |
 | [epic](group/epics/index.md)                                                | `&123`                        | `group1/subgroup&123`                   |                                |
-| vulnerability **(ULTIMATE)** <sup>1</sup>            | `[vulnerability:123]`         | `[vulnerability:namespace/project/123]`    | `[vulnerability:project/123]`    |
+| [vulnerability](application_security/vulnerabilities/index.md) <sup>1</sup> | `[vulnerability:123]`         | `[vulnerability:namespace/project/123]` | `[vulnerability:project/123]`  |
 | feature flag                                                                | `[feature_flag:123]`          | `[feature_flag:namespace/project/123]`  | `[feature_flag:project/123]`   |
 | label by ID                                                                 | `~123`                        | `namespace/project~123`                 | `project~123`                  |
 | one-word label by name                                                      | `~bug`                        | `namespace/project~bug`                 | `project~bug`                  |
@@ -1486,7 +1486,7 @@ but they do not render properly on `docs.gitlab.com`:
 
 #### Copy from spreadsheet and paste in Markdown
 
-[Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/27205) in GitLab 12.7.
+> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/27205) in GitLab 12.7.
 
 If you're working in spreadsheet software (for example, Microsoft Excel, Google
 Sheets, or Apple Numbers), GitLab creates a Markdown table when you copy-and-paste