changed 3 min jobs for matrix anchor

.github/workflows/anchor.yml

@@ -13,8 +13,8 @@ on:
 
 env:
   MAX_JOBS: 64
-  MIN_PROJECTS_PER_JOB: 4
-  MIN_PROJECTS_FOR_MATRIX: 4
+  MIN_PROJECTS_PER_JOB: 3
+  MIN_PROJECTS_FOR_MATRIX: 3
 
 jobs:
   changes: