Adds spelling exceptions for MacOS and Flutterfire

.vscode/cspell.json

@@ -15,6 +15,7 @@
         "dpad",
         "endtemplate",
         "firestore",
+        "flutterfire",
         "gapless",
         "genhtml",
         "goldens",
@@ -22,6 +23,7 @@
         "leaderboard",
         "loadables",
         "localizable",
+        "macos",
         "mixins",
         "mocktail",
         "mostrado",
@@ -47,4 +49,4 @@
     "ignorePaths": [
         ".github/workflows/**"
     ]
-}
+}