update cache version

Author: alephnull

.github/workflows/ci-tests.yml

@@ -78,7 +78,7 @@ jobs:
         run: task services:up
 
       - name: Cache
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ~/go/pkg/mod
           key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}