Merge branch '25092-change-font-commit-list-in-system-note' into 'master'

Resolve "Change font of commit list in a system note according to proposed design"

## What does this MR do?
This MR  closes #25092 
## Are there points in the code the reviewer needs to double check?
NR
## Why was this MR needed?
To improve `UX`
## Screenshots (if relevant)
**Before**
![before](/uploads/50b72a1f818c5a5dc633b06eee3eff92/before.png)
**After**
![after](/uploads/7a488fe22a942af8846fcd202da8f400/after.png)
## Does this MR meet the acceptance criteria?

- [ ] [Changelog entry](https://docs.gitlab.com/ce/development/changelog.html) added
- [ ] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [ ] API support added
- Tests
  - [ ] Added for this feature/bug
  - [x] All builds are passing
- [ ] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [ ] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [ ] Branch has no merge conflicts with `master` (if it does - rebase it please)
- [ ] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?


Closes #25092

See merge request !7822

app/assets/stylesheets/pages/notes.scss

@@ -90,14 +90,14 @@ ul.notes {
         }
 
         &.system-note-commit-list {
-          max-height: 63px;
+          max-height: 70px;
           overflow: hidden;
           display: block;
 
           ul {
-            margin: 3px 0 3px 15px !important;
+            margin: 3px 0 3px 16px !important;
 
-            li {
+            .gfm-commit {
               font-family: $monospace_font;
               font-size: 12px;
             }