github: upgrade actions to go1.20

Author: greenpau

.github/workflows/build.yml

@@ -13,7 +13,7 @@ jobs:
   core:
     strategy:
       matrix:
-        go-version: [1.19.x, 1.20.x]
+        go-version: [1.20.x, 1.21.x]
         platform: [ubuntu-latest]
     name: Build
     runs-on: ${{ matrix.platform }}

.github/workflows/release.yml

@@ -18,7 +18,7 @@ jobs:
       - run: git fetch --force --tags
       - uses: actions/setup-go@v3
         with:
-          go-version: '>=1.19.4'
+          go-version: '>=1.20.7'
           cache: true
       - uses: goreleaser/goreleaser-action@v4
         with: