Deprecation notice for 255 job name limit

data/deprecations/job_char_limit.yml

+# This is a template for a feature deprecation
+# A deprecation typically occurs when a feature or capability is planned to be removed in a future release.
+# Deprecations should be announced at least two releases prior to removal.  Any breaking changes should only be done in major releases.
+#
+# Below is an example of what a single entry should look like, it's required attributes,
+# and what types we expect those attribute values to be.
+#
+# For more information please refer to the handbook documentation here:
+# https://about.gitlab.com/handbook/marketing/blog/release-posts/#deprecations
+#
+# Please delete this line and above before submitting your merge request.
+
+- name: "CI/CD job name length limit" # The name of the feature to be deprecated
+  announcement_milestone: "14.6" # The milestone when this feature was first announced as deprecated.
+  announcement_date: "2021-12-22" # The date of the milestone release when this feature was first announced as deprecated. This should almost always be the 22nd of a month (YYYY-MM-22), unless you did an out of band blog post.
+  removal_milestone: "15.0" # The milestone when this feature is planned to be removed
+  body: | # Do not modify this line, instead modify the lines below.
+    In GitLab 15.0 we are going to limit the number of characters in CI/CD job names to 255. Any pipeline with job names that exceed the 255 character limit will stop working after the 15.0 release.
+# The following items are not published on the docs page, but may be used in the future.
+  stage: # (optional - may be required in the future) String value of the stage that the feature was created in. e.g., Growth
+  tiers: # (optional - may be required in the future) An array of tiers that the feature is available in currently.  e.g., [Free, Silver, Gold, Core, Premium, Ultimate]
+  issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/342800 # (optional) This is a link to the deprecation issue in GitLab
+  documentation_url: # (optional) This is a link to the current documentation page
+  image_url: # (optional) This is a link to a thumbnail image depicting the feature
+  video_url: # (optional) Use the youtube thumbnail URL with the structure of https://img.youtube.com/vi/UNIQUEID/hqdefault.jpg
+  removal_date: # (optional - may be required in the future) YYYY-MM-DD format. This should almost always be the 22nd of a month (YYYY-MM-22), the date of the milestone release when this feature is planned to be removed

doc/update/deprecations.md

@@ -76,6 +76,12 @@ dramatically slow down GitLab instances. For this reason, they are being removed
 
 Announced: 2021-09-22
 
+### CI/CD job name length limit
+
+In GitLab 15.0 we are going to limit the number of characters in CI/CD job names to 255. Any pipeline with job names that exceed the 255 character limit will stop working after the 15.0 release.
+
+Announced: 2021-12-22
+
 ### Certificate-based integration with Kubernetes
 
 [We are deprecating the certificate-based integration with Kubernetes](https://about.gitlab.com/blog/2021/11/15/deprecating-the-cert-based-kubernetes-integration/).