move to cache@v4

Author: mohawk2

github-actions/build-dzil-dist/action.yml

@@ -3,7 +3,7 @@ runs:
   using: "composite"
   steps:
     - name: Cache ~/perl5
-      uses: actions/cache@v2
+      uses: actions/cache@v4
       with:
         key: ${{ runner.os }}-dist-locallib
         path: ~/perl5

github-actions/ci-dist/action.yml

@@ -255,7 +255,7 @@ runs:
                 (  fromJSON(inputs.target-all)
                 || fromJSON(inputs.target-setup-perl)
                 )
-      uses: actions/cache@v2
+      uses: actions/cache@v4
       with:
         key: locallib-v2.${{ inputs.perl-deps-cache-version }}-${{ runner.os }}-${{ env.GHA_CACHE_PERL_V_HASH }}
         path: ~/perl5