ci: get go version from go.mod file (#56)

Author: paralta

.github/workflows/release.yaml

@@ -19,7 +19,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v4
         with:
-          go-version: ${{ env.GO_VERSION }}
+          go-version-file: 'grype-server/go.mod'
 
       - name: Run verification
         run: make check