ci: use Cysharp/Actions checkout instead of 3rd party directly

Author: guitarrapc

.github/workflows/build-debug.yml

@@ -13,6 +13,6 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: Cysharp/Actions/.github/actions/checkout@main
       - uses: Cysharp/Actions/.github/actions/setup-dotnet@main
       - run: dotnet build -c Debug

.github/workflows/build-release.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: Cysharp/Actions/.github/actions/checkout@main
       - uses: Cysharp/Actions/.github/actions/setup-dotnet@main
       # pack nuget
       - run: dotnet build -c Release -p:Version=${{ inputs.tag }}

.github/workflows/toc.yml

@@ -8,8 +8,7 @@ on:
 jobs:
   generateTOC:
     name: TOC Generator
-    runs-on: ubuntu-latest
-    steps:
-      - uses: technote-space/toc-generator@9e238e7974de5fcf7b17b7acc54c896160dda0a3 # v4.3.1
-        with:
-          TOC_TITLE: "## Table of Contents"
+    uses: Cysharp/Actions/.github/workflows/toc-generator.yaml@main
+    with:
+      TOC_TITLE: "## Table of Contents"
+    secrets: inherit