ci: 更新 workflows 中使用的 action，避免 node 版本低于 24 的 warning (#689)

.github/workflows/pr-check.yaml

@@ -24,7 +24,7 @@ jobs:
     if: ${{ github.event_name == 'push' || !github.event.pull_request.draft }}
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - run: rustup install && rustup component add rustfmt --toolchain nightly
 
@@ -50,7 +50,7 @@ jobs:
         working-directory: web
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Setup bun
         uses: oven-sh/setup-bun@v2
         with:
@@ -58,7 +58,7 @@ jobs:
       - name: Install dependencies
         run: bun install --frozen-lockfile
       - name: Cache dependencies
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.bun/install/cache
           key: ${{ runner.os }}-bun-${{ hashFiles('docs/bun.lockb') }}