Update cmake.yml

Author: TartanLlama

.github/workflows/cmake.yml

@@ -49,6 +49,9 @@ jobs:
           - cxx: g++-9
             std: 17
             install: apt install -y g++-9
+          - cxx: g++-10
+            std: 11
+            install: apt install -y g++-10
           - cxx: g++-10
             std: 14
             install: apt install -y g++-10