Update test workflow Go version

Author: kyoh86

.github/workflows/test.yml

@@ -20,7 +20,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v6
         with:
-          go-version: 1.21
+          go-version: 1.23
       - name: Test Go
         run: go test -v --race ./...
   test-release:
@@ -32,7 +32,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v6
         with:
-          go-version: 1.21
+          go-version: 1.23
       - name: Try Bump-up Semantic Version
         uses: kyoh86/git-vertag-action@v1
         with:
@@ -50,7 +50,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v6
         with:
-          go-version: 1.21
+          go-version: 1.23
       - name: Search diagnostics
         uses: golangci/golangci-lint-action@v9
   set-releasable-status: