chore(deps): update actions/checkout action to v6

Author: renovate[bot]

.github/workflows/release-macos.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: macos-14
     steps:
       - name: Checkout
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
       - name: Unshallow
         run: git fetch --prune --unshallow
       - name: Set up Go

.github/workflows/test.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
         with:
           fetch-depth: 0
       - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0

.github/workflows/tidy.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
         if: github.actor == 'dependabot[bot]' || github.actor == 'dependabot-preview[bot]'
       - name: reattach HEAD to Head Ref
         # b/c checkout action leaves in detached head state https://github.com/actions/checkout/issues/6