fix name of mac build with c++14

6 jobs for CI in 7 minutes and 30 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #79675
Linux
clang-c++11

00:06:46

passed #79677
Linux
clang-c++14

00:03:22

passed #79674
Linux
gcc-c++11

00:02:45

passed #79676
Linux
gcc-c++14

00:02:34

passed #79678
Apple
macos-c++11

00:03:00

passed #79679
Apple
macos-c++14

00:05:22