Bump cygwin/cygwin-install-action

Bumps [cygwin/cygwin-install-action](https://github.com/cygwin/cygwin-install-action) from a0ef6efb597704ae419d1641ac1cd515d4ebba6e to 4ef15ca7fd18a18f1000989fcfd968e06d146ce8.
- [Release notes](https://github.com/cygwin/cygwin-install-action/releases)
- [Commits](cygwin/cygwin-install-action@a0ef6ef...4ef15ca)

---
updated-dependencies:
- dependency-name: cygwin/cygwin-install-action
  dependency-version: 4ef15ca7fd18a18f1000989fcfd968e06d146ce8
  dependency-type: direct:production
...

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

Author: dependabot[bot]

.github/workflows/run.yml

@@ -22,7 +22,7 @@ jobs:
 
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
-      - uses: cygwin/cygwin-install-action@a0ef6efb597704ae419d1641ac1cd515d4ebba6e # master
+      - uses: cygwin/cygwin-install-action@4ef15ca7fd18a18f1000989fcfd968e06d146ce8 # master
 
       - name: Install Subversion (SVN) on Windows
         run: |