Correct the capitalization of Crowdin

doc/development/i18n/index.md

@@ -32,8 +32,8 @@ See [Externalization for GitLab](externalization.md).
 ## Translate strings
 
 The translation process is managed at [https://translate.gitlab.com](https://translate.gitlab.com)
-using [CrowdIn](https://crowdin.com/).
-You must create a CrowdIn account before you can submit translations. Once you are signed in, select
+using [Crowdin](https://crowdin.com/).
+You must create a Crowdin account before you can submit translations. Once you are signed in, select
 the language you wish to contribute translations to.
 
 Voting for translations is also valuable, helping to confirm good translations and flag inaccurate
@@ -54,4 +54,4 @@ instructions on becoming a proofreader yourself.
 
 Translations are typically included in the next major or minor release.
 
-See [Merging translations from CrowdIn](merging_translations.md).
+See [Merging translations from Crowdin](merging_translations.md).