ci: add Takumi Guard setup step to build workflow

Author: KengoTODA

.github/workflows/build.yml

@@ -17,6 +17,7 @@ jobs:
       - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6
         with:
           fetch-depth: 0
+      - uses: flatt-security/setup-takumi-guard-npm@0f69e1fc4f2c4e55dd52abcafa7c4249cd6c7e50 # v1
       - name: Set up Node.js
         uses: actions/setup-node@395ad3262231945c25e8478fd5baf05154b1d79f # v6
         with: