Add clarification of repo size limits

Updates the docs to add clarity around the types of projects that size
limits apply to (private and public)

Changelog: changed

doc/user/admin_area/settings/account_and_limit_settings.md

@@ -125,7 +125,7 @@ is rejected.
 
 NOTE:
 The repository size limit includes repository files and LFS, but does not include artifacts, uploads,
-wiki, packages, or snippets.
+wiki, packages, or snippets. The repository size limit applies to both private and public projects.
 
 For details on manually purging files, see [reducing the repository size using Git](../../project/repository/reducing_the_repo_size_using_git.md).
 

doc/user/gitlab_com/index.md

@@ -158,7 +158,7 @@ If you are near or over the repository size limit, you can either
 NOTE:
 `git push` and GitLab project imports are limited to 5 GB per request through
 Cloudflare. Git LFS and imports other than a file upload are not affected by
-this limit.
+this limit. Repository limits apply to both public and private projects.
 
 ## IP range