ci: Update mymindstorm/setup-emsdk from v12 to v14. (#247)

Author: waywardmonkeys

.github/workflows/main.yml

@@ -150,7 +150,7 @@ jobs:
         with:
           submodules: true
 
-      - uses: mymindstorm/setup-emsdk@v12
+      - uses: mymindstorm/setup-emsdk@v14
         with:
           version: "3.1.44"