Upgrade cache action from v2 to v4

kklamberty · web-flow · commit c3224bd86717 · 2025-09-09T20:31:05.000-05:00
diff --git a/.github/workflows/main_valgrind.yml b/.github/workflows/main_valgrind.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Cache gtest library
-      uses: actions/cache@v2
+      uses: actions/cache@v4
       env:
         cache-name: cache-gtest-lib
       with:
