Fixed broken workflow that was silently failing

Author: azonenberg

.github/workflows/build-ubuntu.yml

@@ -154,7 +154,7 @@ jobs:
         ctest --output-on-failure
 
     - name: Run Tests (Modern Vulkan ICD path)
-      if: ${{ (!  matrix.docs) && (matrix.os ~= 'ubuntu-22.04') }}
+      if: ${{ (!  matrix.docs) && (! matrix.os == 'ubuntu-22.04') }}
       run: |
         export VK_ICD_FILENAMES=/usr/share/vulkan/icd.d/lvp_icd.json
         cd build