Update to Go v1.21 (CI)

Author: joanlopez

.github/workflows/main.yaml

@@ -13,10 +13,10 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go: [ '1.20' ]
+        go: [ '1.21' ]
     steps:
-      - name: Check out the source code
-        uses: actions/checkout@v3
+      - name: Checkout
+        uses: actions/checkout@v4
       - name: Set up Go
         uses: actions/setup-go@v4
         with:

.github/workflows/release.yml

@@ -10,13 +10,13 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Set up Go
-        uses: actions/setup-go@v4
+        uses: actions/setup-go@v5
         with:
-          go-version: '1.20'
+          go-version: '1.21'
       - name: Run GoReleaser
         uses: goreleaser/goreleaser-action@v4
         if: startsWith(github.ref, 'refs/tags/')