Update Go version to 1.21 in GitHub workflows

This commit updates the Go version from 1.20 to 1.21 on three GitHub workflow files: golangci-lint.yml, codecov.yml, and sonarqube.yml. The change ensures we use the latest Go version which is more efficient and comes with additional features, leading to improved project performance.

.github/workflows/codecov.yml

@@ -33,7 +33,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        go: [1.16, 1.17, 1.18, 1.19, '1.20']
+        go: [1.17, 1.18, 1.19, '1.20', '1.21']
     steps:
     - name: Checkout Code
       uses: actions/checkout@master

.github/workflows/golangci-lint.yml

@@ -21,7 +21,7 @@ jobs:
     steps:
       - uses: actions/setup-go@v3
         with:
-          go-version: '1.20'
+          go-version: '1.21'
       - uses: actions/checkout@v3
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v3

.github/workflows/sonarqube.yml

@@ -29,7 +29,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v3
         with:
-          go-version: '1.20.x'
+          go-version: '1.21.x'
           
       - name: Run unit Tests
         run: |