upgrade to Go 1.21

Author: xrstf

.github/workflows/release.yml

@@ -22,15 +22,18 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
+
       - name: Unshallow
         run: git fetch --prune --unshallow
+
       - name: Set up Go
-        uses: actions/setup-go@v2
+        uses: actions/setup-go@v4
         with:
-          go-version: 1.20.6
+          go-version: '1.21.0'
+
       - name: Run GoReleaser
-        uses: goreleaser/goreleaser-action@v2
+        uses: goreleaser/goreleaser-action@v4
         with:
           version: latest
           args: release --clean