ci: bump checkout and setup-node pins from v4 to v6

.github/workflows/ci.yml

@@ -13,8 +13,8 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 15
     steps:
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
-      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
+      - uses: actions/checkout@d23441a48e516b6c34aea4fa41551a30e30af803 # v6
+      - uses: actions/setup-node@249970729cb0ef3589644e2896645e5dc5ba9c38 # v6
         with:
           node-version: '24'
           cache: npm

.github/workflows/release.yml

@@ -42,14 +42,14 @@ jobs:
       id-token: write
       contents: read
     steps:
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+      - uses: actions/checkout@d23441a48e516b6c34aea4fa41551a30e30af803 # v6
 
       # No registry-url on purpose (pinhole's publish.yml learned this): with
       # it, setup-node writes an .npmrc pointing auth at NODE_AUTH_TOKEN — a
       # placeholder that overrides OIDC and 404s every publish even when the
       # trusted-publisher record exists. Without it, npm publish exchanges the
       # id-token via the package's trusted-publisher record.
-      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
+      - uses: actions/setup-node@249970729cb0ef3589644e2896645e5dc5ba9c38 # v6
         with:
           node-version: '24'
           cache: npm