Coverage workflow is to use oneAPI 2021.3

This would work around a bug reported as #611 and independently
serve to ascertain that code remains buildable with older compiler.

Author: oleksandr-pavlyk

.github/workflows/generate-coverage.yaml

@@ -29,8 +29,8 @@ jobs:
 
       - name: Install Intel OneAPI
         run: |
-          sudo apt-get install intel-oneapi-dpcpp-cpp-compiler
-          sudo apt-get install intel-oneapi-tbb
+          sudo apt-get install intel-oneapi-dpcpp-cpp-compiler=2021.3.0
+          sudo apt-get install intel-oneapi-tbb=2021.3.0
 
       - name: Install CMake
         run: |