Fixing missing tool from release build

Author: jbogard

.github/workflows/release.yml

@@ -37,6 +37,8 @@ jobs:
           8.0.x
           9.0.x
           10.0.x
+    - name: Install NuGetKeyVaultSignTool
+      run: dotnet tool install --global NuGetKeyVaultSignTool
     - name: Build and Test
       run: ./Build.ps1
       shell: pwsh