build: bump dist/brackets.js prod size limit to 12 MB

Author: abose

gulpfile.js/validate-build.js

@@ -40,7 +40,7 @@ const PROD_MAX_TOTAL_SIZE_MB = 80;
 // for the aggregate/total). Bump a limit only enough to restore that margin when a file legitimately
 // grows - don't pad it large, so unexpected size jumps still get caught.
 const LARGE_FILE_LIST_PROD = {
-    'dist/brackets.js': 11, // this is the full minified file itself renamed in prod (~10 MB + 1 MB margin)
+    'dist/brackets.js': 12, // this is the full minified file itself renamed in prod (~11 MB + 1 MB margin)
     'dist/phoenix/virtualfs.js.map': 3
 };