ci: enable cache

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

.github/workflows/build.yml

@@ -41,10 +41,16 @@ jobs:
         uses: codecov/codecov-action@v2
         with:
           file: ./coverage/coverage.txt
+      -
+        name: Expose GitHub Runtime
+        uses: crazy-max/ghaction-github-runtime@v1
       -
         name: Build binaries
         run: |
           make release
+        env:
+          CACHE_FROM: type=gha,scope=release
+          CACHE_TO: type=gha,scope=release
       -
         name: Upload artifacts
         uses: actions/upload-artifact@v2