fix(languages): update GitHub languages JSON file

Author: jaebradley

src/languages.json

@@ -5180,7 +5180,7 @@
       "M2"
     ],
     "aceMode": "text",
-    "tmScope": "source.macaulay2",
+    "tmScope": "source.m2",
     "color": "#d8ffff",
     "languageId": 34167825,
     "name": "Macaulay2",
@@ -10654,7 +10654,7 @@
     "extensions": [
       ".mrc"
     ],
-    "tmScope": "source.mrc",
+    "tmScope": "source.msl",
     "aceMode": "text",
     "languageId": 517654727,
     "name": "mIRC Script",