ci: bump actions/setup-go from 5 to 6 (microsoft#647)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/golangci-lint.yml

@@ -9,7 +9,7 @@ jobs:
     name: lint-pr-changes
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/setup-go@v5
+      - uses: actions/setup-go@v6
         with:
           go-version: '1.24'
       - uses: actions/checkout@v6

.github/workflows/pr-validation.yml

@@ -11,7 +11,7 @@ jobs:
     steps:
     - uses: actions/checkout@v6
     - name: Setup go
-      uses: actions/setup-go@v5
+      uses: actions/setup-go@v6
       with:
         go-version: '1.24'
     - name: Run tests against Linux SQL

.github/workflows/security.yml

@@ -27,7 +27,7 @@ jobs:
         uses: actions/checkout@v6
 
       - name: Setup Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
         with:
           go-version: '1.24'