CI adjustments: no BC, resyntax only monthly

Author: mflatt

.github/workflows/ci.yml

@@ -11,7 +11,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        racket-variant: ["BC", "CS"]
+        racket-variant: ["CS"]
     steps:
       - uses: actions/checkout@master
       # The next two step was copied from the CI config for Typed Racket:

.github/workflows/resyntax-autofixer.yml

@@ -3,7 +3,7 @@ name: Resyntax Autofixer
 on:
   workflow_dispatch:
   schedule:
-    - cron: "0 0 * * 3"
+    - cron: "0 0 8 * *"
 
 jobs:
   autofix: