chore(workflows): Downgrade GitHub Actions cache version

Downgrade the GitHub Actions cache version from v4 to v3 in the main workflow file.

.github/workflows/main.yml

@@ -16,7 +16,7 @@ jobs:
       - uses: actions/checkout@v3
         with:
           fetch-depth: 0
-      - uses: actions/cache@v4
+      - uses: actions/cache@v3
         with:
           path: |
             ~/.gradle/caches