fix CI

Author: kosloot

.github/workflows/mbt.yml

@@ -31,7 +31,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest]
-        compiler: [g++-12, clang++]
+        compiler: [g++-12, clang++ -std=c++17]
 
     steps:
       - name: Cancel Previous Runs