ci: Update cache action to modern version (AcademySoftwareFoundation#1953)

Signed-off-by: Larry Gritz <lg@larrygritz.com>

Author: lgritz

.github/workflows/ci.yml

@@ -156,7 +156,7 @@ jobs:
         run: echo "::set-output name=date::`date -u +'%Y-%m-%dT%H:%M:%SZ'`"
       - name: ccache
         id: ccache
-        uses: actions/cache@c3f1317a9e7b1ef106c153ac8c0f00fed3ddbc0d # v3.0.4
+        uses: actions/cache@1bd1e32a3bdc45362d1e726936510720a7c30a57 # v4.2.0
         with:
           path: /tmp/ccache
           key: ${{github.job}}-${{matrix.nametag}}-${{steps.ccache_cache_keys.outputs.date}}