move ncommits check to correct place

It's on `squash+merge me` but belongs on `merge+no rebase`. Oops!

Author: geekosaur

.github/mergify.yml

@@ -85,10 +85,6 @@ pull_request_rules:
       - label=merge delay passed
       - '#approved-reviews-by>=2'
       - '-label~=^blocked:'
-      # unlike the others, we need to force this one to be up to date
-      # because it's intended for when Mergify doesn't have permission
-      # to rebase
-      - '#commits-behind=0'
 
   # merge+no rebase strategy
   - actions:
@@ -101,6 +97,10 @@ pull_request_rules:
       - label=merge delay passed
       - '#approved-reviews-by>=2'
       - '-label~=^blocked:'
+      # unlike the others, we need to force this one to be up to date
+      # because it's intended for when Mergify doesn't have permission
+      # to rebase
+      - '#commits-behind=0'
 
   # merge strategy for release branches
   - actions: