Fix clang-format set to 11

Author: knewbury01

.github/workflows/validate-coding-standards.yml

@@ -136,7 +136,7 @@ jobs:
 
       - name: Install clang-format
         run: |
-          sudo apt-get install --yes --quiet --no-install-recommends clang-format-10
+          sudo apt-get install --yes --quiet --no-install-recommends clang-format-11
           echo "::debug::$(clang-format -version)"
 
       - name: Validate C++ Test Files