fix: resolve GitHub Action test failures caused by security fixes

- Update actions/cache from deprecated commit hash to @v4
- The commit hash 0c45773b623bea8c8e75f6c82b208c3cf94ea4f9 was deprecated by GitHub
- This was causing all GitHub Action workflow tests to fail
- Using semantic version @v4 is the recommended approach

Root cause: Security fixes in previous commit used pinned commit hash
that GitHub has since deprecated, breaking all action tests.

Fixes #92

Author: ajitpratap0

action.yml

@@ -89,7 +89,7 @@ runs:
 
     - name: Cache GoSQLX binary
       id: cache-gosqlx
-      uses: actions/cache@0c45773b623bea8c8e75f6c82b208c3cf94ea4f9  # v4.0.2
+      uses: actions/cache@v4
       with:
         path: ~/go/bin/gosqlx
         key: gosqlx-${{ inputs.gosqlx-version }}-${{ runner.os }}-${{ runner.arch }}