Pin actions/setup-node action to 49933ea (#1239)

Author: renovate[bot]

.github/workflows/build.yml

@@ -51,7 +51,7 @@ jobs:
         & .\dotnet-install.ps1 -Architecture x86 -Version 9.0.101 -InstallDir "C:\Program Files (x86)\dotnet\" -NoPath -Verbose
       if: runner.os == 'Windows'
     - name: ⚙ Install node.js
-      uses: actions/setup-node@v4
+      uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
       with:
         node-version: 20.x
         cache: yarn