chore: modify setup-node (googleapis#3821)

Author: leahecole

.github/workflows/ci.yaml

@@ -13,7 +13,7 @@ jobs:
         node: [18, 20, 22]
     steps:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
-      - uses: actions/setup-node@v5
+      - uses: actions/setup-node@v6
         with:
           node-version: ${{ matrix.node }}
       - run: node --version
@@ -31,7 +31,7 @@ jobs:
     runs-on: windows-latest
     steps:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
-      - uses: actions/setup-node@v5
+      - uses: actions/setup-node@v6
         with:
           node-version: 22
       - run: npm install
@@ -42,7 +42,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
-      - uses: actions/setup-node@v5
+      - uses: actions/setup-node@v6
         with:
           node-version: 22
       - run: npm install
@@ -51,7 +51,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
-      - uses: actions/setup-node@v5
+      - uses: actions/setup-node@v6
         with:
           node-version: 22
       - run: npm install

.github/workflows/issues-no-repro.yaml

@@ -11,7 +11,7 @@ jobs:
       pull-requests: write
     steps:
       - uses: actions/checkout@v5
-      - uses: actions/setup-node@v5
+      - uses: actions/setup-node@v6
         with:
           node-version: 18
       - run: npm install

.github/workflows/update-apis.yaml

@@ -7,7 +7,7 @@ jobs:
   update-apis:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/setup-node@v5
+      - uses: actions/setup-node@v6
         with:
           node-version: 22
       - run: gh repo fork googleapis/google-api-nodejs-client --fork-name google-api-nodejs-client-autodisco --clone --remote