github: Update GitHub-provided actions so they don't use deprecated Node.js 12

.github/workflows/sonarcloud.yml

@@ -26,10 +26,10 @@ jobs:
     env:
       TEST: sonarcloud
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: 0
-      - uses: actions/cache@v2
+      - uses: actions/cache@v3
         with:
           path: |
             ~/.cache/ccache