Release Post 12.5 - associate milestone with release

Cherry Picked from !32527 (merged)

The MR was already merged for 12.4, but pulled out when we found out that this issue was not complete.

Release blog post 12.4 - milestone_associated_to_release.yml

See merge request !32527 (merged)

(cherry picked from commit 15efab2d)

8809381a Update data/release_posts/unreleased/milestone_associated_to_release.yml 19d9931f Update data/release_posts/unreleased/associate_milestone_to_release.png b9e24055 Update data/release_posts/unreleased/milestone_associated_to_release.yml ed502495 Update data/release_posts/unreleased/Allow milestone(s) to be associated with a release.png 9c5028dc Apply suggestion to data/release_posts/unreleased/milestone_associated_to_release.yml e2b3517b Update data/release_posts/unreleased/Associate milestone(s) with a release.yml 98aa80db Update data/release_posts/unreleased/Associate milestone(s) with a release.png 30f2a52c Update data/release_posts/unreleased/milestone_associated_to_release.yml 25498f37 Apply suggestion to data/release_posts/unreleased/milestone_associated_to_release.yml 8a2b22ad Update data/release_posts/unreleased/associate_milestone_to_release.png 34d7030c added img extension d22e5e4d Deleted data/release_posts/unreleased/associate_milestone_to_release.png fa593240 fixed broken image url 48884154 changed image location f74ffa7f fixed img link path 4cb403b1 Update milestone_associated_to_release.yml 4808c062 Deleted image in wrong folder and fixed image location typo