Fetch last 100 commits for LLVM sources

Author: alsepkow

.github/workflows/clang-format-checker.yml

@@ -23,7 +23,8 @@ jobs:
         uses: step-security/changed-files@3dbe17c78367e7d60f00d78ae6781a35be47b4a1 # v45.0.1
         with:
           separator: ","
-          skip_initial_fetch: true
+          # skip_initial_fetch: true
+          fetch_depth: 100 # Fetches only the last 100 commits
 
       - name: "Listed files"
         env: