chore: switch actions to sha (#409)

Author: 43081j

.github/workflows/ci.yml

@@ -20,8 +20,8 @@ jobs:
           - 22 # remove May 2027
           - x.x.x # safety net; don't remove
     steps:
-      - uses: actions/checkout@v6
-      - uses: actions/setup-node@v6
+      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/setup-node@395ad3262231945c25e8478fd5baf05154b1d79f # v6.1.0
         with:
           node-version: ${{ matrix.node_version }}
       - run: npm ci

.github/workflows/npm-publish.yml

@@ -11,8 +11,8 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
-      - uses: actions/setup-node@v6
+      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/setup-node@395ad3262231945c25e8478fd5baf05154b1d79f # v6.1.0
         with:
           node-version: 24
       - run: npm ci
@@ -24,8 +24,8 @@ jobs:
     permissions:
       id-token: write
     steps:
-      - uses: actions/checkout@v6
-      - uses: actions/setup-node@v6
+      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/setup-node@395ad3262231945c25e8478fd5baf05154b1d79f # v6.1.0
         with:
           node-version: 24.x
           registry-url: 'https://registry.npmjs.org'