[chore] Explictly bump to go1.21.7 (#470)

Author: mx-psi

.github/workflows/ci-goreleaser.yaml

@@ -53,7 +53,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v5
         with:
-          go-version: '~1.21.5'
+          go-version: '~1.21.7'
           check-latest: true
 
       - name: Generate the sources

.github/workflows/ci.yaml

@@ -19,7 +19,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v5
         with:
-          go-version: '~1.21.5'
+          go-version: '~1.21.7'
           check-latest: true
 
       - name: Verify

.github/workflows/release.yaml

@@ -40,7 +40,7 @@ jobs:
 
       - uses: actions/setup-go@v5
         with:
-          go-version: '~1.21.5'
+          go-version: '~1.21.7'
           check-latest: true
 
       - name: Generate distribution sources
@@ -108,7 +108,7 @@ jobs:
 
       - uses: actions/setup-go@v5
         with:
-          go-version: '~1.21.5'
+          go-version: '~1.21.7'
           check-latest: true
 
       - uses: actions/download-artifact@v3