Build(deps): Bump diff-lcs from 1.4.1 to 1.4.3 (#10145)

Bumps [diff-lcs](https://github.com/halostatue/diff-lcs) from 1.4.1 to 1.4.3.
- [Release notes](https://github.com/halostatue/diff-lcs/releases)
- [Changelog](https://github.com/halostatue/diff-lcs/blob/master/History.md)
- [Commits](https://github.com/halostatue/diff-lcs/compare/v1.4.1...v1.4.3)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Gemfile.lock

@@ -96,7 +96,7 @@ GEM
     css_parser (1.7.1)
       addressable
     debug_inspector (0.0.3)
-    diff-lcs (1.4.1)
+    diff-lcs (1.4.3)
     diffy (3.3.0)
     discourse-ember-source (3.12.2.0)
     discourse_image_optim (0.26.2)