bump actions/setup-go to v6 and golangci-lint-action to v9

Author: mtingers

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
         go-version: ['1.23', '1.24']
     steps:
       - uses: actions/checkout@v6
-      - uses: actions/setup-go@v5
+      - uses: actions/setup-go@v6
         with:
           go-version: ${{ matrix.go-version }}
       - run: go test ./... -count=1 -race
@@ -23,9 +23,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
-      - uses: actions/setup-go@v5
+      - uses: actions/setup-go@v6
         with:
           go-version: '1.24'
-      - uses: golangci/golangci-lint-action@v6
+      - uses: golangci/golangci-lint-action@v9
         with:
           version: latest

.github/workflows/publish.yml

@@ -12,7 +12,7 @@ jobs:
         go-version: ['1.23', '1.24']
     steps:
       - uses: actions/checkout@v6
-      - uses: actions/setup-go@v5
+      - uses: actions/setup-go@v6
         with:
           go-version: ${{ matrix.go-version }}
       - name: Test