Bump racc from 1.7.2 to 1.7.3

Bumps [racc](https://github.com/tenderlove/racc) from 1.7.2 to 1.7.3.
- [Release notes](https://github.com/tenderlove/racc/releases)
- [Changelog](https://github.com/ruby/racc/blob/master/ChangeLog)
- [Commits](ruby/racc@v1.7.2...v1.7.3)

---
updated-dependencies:
- dependency-name: racc
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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

Gemfile.lock

@@ -518,7 +518,7 @@ GEM
       nio4r (~> 2.0)
     pundit (2.3.1)
       activesupport (>= 3.0.0)
-    racc (1.7.2)
+    racc (1.7.3)
     rack (2.2.8)
     rack-attack (6.7.0)
       rack (>= 1.0, < 4)