🚚(ci) rename meet.yml to ci.yml

The repository is already called meet, so the file name said nothing
about what the workflow holds. The print-statement check now excludes
the whole workflows directory rather than one file by name: its own
grep carries the literal print(, so the rename would otherwise match
it on the deleted lines and fail the job.

.github/workflows/ci.yml

@@ -1,4 +1,4 @@
-name: meet Workflow
+name: CI
 
 on:
   push:
@@ -26,7 +26,7 @@ jobs:
       - name: Enforce absence of print statements in code
         if: always()
         run: |
-          ! git diff origin/${{ github.event.pull_request.base.ref }}..HEAD -- . ':(exclude)**/meet.yml' | grep "print("
+          ! git diff origin/${{ github.event.pull_request.base.ref }}..HEAD -- . ':(exclude).github/workflows/**' | grep "print("
       - name: Check absence of fixup commits
         if: always()
         run: |