ci: use macos to match matrix name

Author: Bambooin

.github/workflows/commit-ci.yml

@@ -27,7 +27,7 @@ jobs:
           echo CI_BRANCH=${GITHUB_REF#refs/*/} >> $GITHUB_ENV
 
       - name: Install macOS utils
-        if: startsWith(matrix.os, 'macOS')
+        if: startsWith(matrix.os, 'macos')
         run: |
           brew install coreutils clang-format
 

.github/workflows/pull-request-ci.yml

@@ -34,7 +34,7 @@ jobs:
           echo CI_BRANCH=${GITHUB_REF#refs/*/} >> $GITHUB_ENV
 
       - name: Install macOS utils
-        if: startsWith(matrix.os, 'macOS')
+        if: startsWith(matrix.os, 'macos')
         run: |
           brew install coreutils clang-format