Try to prevent compilation errors with macos-13 runner

Author: mgrojo

.github/workflows/main.yml

@@ -17,7 +17,7 @@ jobs:
       fail-fast: false # Don't stop all the workflows when one of them fails.
 
       matrix:
-        os: [ubuntu-22.04, windows-latest, macos-latest] # List of GitHub Actions platform to run the workflow on
+        os: [ubuntu-22.04, windows-latest, macos-13] # List of GitHub Actions platform to run the workflow on
     env:
       # For WolfSSL:
       #  set the value of the environment variable OS to Windows when running on the Windows operating system and to Linux_Or_Mac otherwise