Use action-prebuildify v4 naming for node-gyp-build 4.x

Point to action-prebuildify@support-node-gyp-build-v4 branch and set
node-gyp-build-major: 4 so prebuilds use the new tag-based filename
convention compatible with node-gyp-build v4.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: szegedi

.github/workflows/build.yml

@@ -35,13 +35,14 @@ jobs:
       - run: npm run test:js-valgrind
 
   build:
-    uses: Datadog/action-prebuildify/.github/workflows/build.yml@main
+    uses: Datadog/action-prebuildify/.github/workflows/build.yml@support-node-gyp-build-v4
     with:
       target-name: 'dd_pprof' # target name in binding.gyp
       package-manager: 'npm' # npm or yarn
       cache: true # enable caching of dependencies based on lockfile
       min-node-version: 18
       skip: 'linux-arm,linux-ia32' # skip building for these platforms
+      node-gyp-build-major: 4
 
   dev_publish:
     needs: build