Merge pull request #4516 from ChrisRackauckas-Claude/disable-downgrade-ci

CI: disable Downgrade workflow until ecosystem stabilizes

Author: ChrisRackauckas

.github/workflows/Downgrade.yml

@@ -14,6 +14,7 @@ on:
       - 'benchmark/**'
 jobs:
   test:
+    if: false
     runs-on: ubuntu-latest
     strategy:
       matrix: