fix: update MSBuild setup action to version 3 in workflows

Author: rajbos

.github/workflows/release.yml

@@ -488,7 +488,7 @@ jobs:
     # ── Build Visual Studio extension (MSBuild / VSSDK) ───────────────────
 
     - name: Add MSBuild to PATH
-      uses: microsoft/setup-msbuild@6fb02220983dee41ce7ae257b6f4d8f9bf5ed4ce # v2.0.0
+      uses: microsoft/setup-msbuild@30375c66a4eea26614e0d39710365f22f8b0af57 # v3
 
     - name: Restore NuGet packages
       working-directory: visualstudio-extension

.github/workflows/visualstudio-build.yml

@@ -140,7 +140,7 @@ jobs:
       # ── Build Visual Studio extension (MSBuild / VSSDK) ───────────────────
 
       - name: Add MSBuild to PATH
-        uses: microsoft/setup-msbuild@6fb02220983dee41ce7ae257b6f4d8f9bf5ed4ce # v2.0.0
+        uses: microsoft/setup-msbuild@30375c66a4eea26614e0d39710365f22f8b0af57 # v3
 
       - name: Restore NuGet packages
         working-directory: visualstudio-extension