Update actions/setup-go action to v6

Author: renovate[bot]

.github/workflows/go-coverage.yml

@@ -25,7 +25,7 @@ jobs:
           fetch-depth: 0
 
       - name: Set up Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
         with:
           go-version: "1.25.x"
 

.github/workflows/go-lint.yml

@@ -25,7 +25,7 @@ jobs:
       - uses: actions/checkout@v5
 
       - name: Set up Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
         with:
           go-version: ${{ matrix.go }}
           check-latest: false

.github/workflows/go-test.yml

@@ -25,7 +25,7 @@ jobs:
       - uses: actions/checkout@v5
 
       - name: Set up Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
         with:
           go-version: ${{ matrix.go }}
           check-latest: false