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

Author: renovate[bot]

.github/workflows/check-eol-newrelease.yml

@@ -15,7 +15,7 @@ jobs:
     if: github.repository == 'line/line-bot-mcp-server'
     steps:
       - name: Check out code
-        uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
 
       - name: Run EoL & NewRelease check
         uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0

.github/workflows/create-draft-release.yml

@@ -45,7 +45,7 @@ jobs:
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       - name: Fetch Latest Release
         id: get-latest-release
         uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0

.github/workflows/label-issue.yml

@@ -13,7 +13,7 @@ jobs:
     permissions:
       issues: write
     steps:
-      - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
 
       - name: Add label on issue open
         if: github.event.action == 'opened' || github.event.action == 'reopened'

.github/workflows/npm-audit.yml

@@ -16,7 +16,7 @@ jobs:
       issues: write
     if: github.repository == 'line/line-bot-mcp-server'
     steps:
-      - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       - uses: actions/setup-node@2028fbc5c25fe9cf00d9f06a71cc4710d4507903 # v6.0.0
         with:
           node-version: '24'

.github/workflows/release.yml

@@ -16,7 +16,7 @@ jobs:
       id-token: write
       issues: write
     steps:
-      - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       # Setup .npmrc file to publish to GitHub Packages
       - uses: actions/setup-node@2028fbc5c25fe9cf00d9f06a71cc4710d4507903 # v6.0.0
         with:

.github/workflows/test.yml

@@ -23,7 +23,7 @@ jobs:
     name: Node.js ${{ matrix.node }}
 
     steps:
-      - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
         with:
           submodules: true
       - name: Setup Node.js
@@ -47,7 +47,7 @@ jobs:
     permissions:
       contents: read
     steps:
-      - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
         with:
           submodules: true
       - name: Build Docker image
@@ -58,7 +58,7 @@ jobs:
     permissions:
       contents: read
     steps:
-      - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       - name: Run pinact
         uses: suzuki-shunsuke/pinact-action@49cbd6acd0dbab6a6be2585d1dbdaa43b4410133 # v1.0.0
         with: