Add EnricoMi to approver author list, end expression with $ (#4246)

* Add EnricoMi to approver author list
* Add $ to the end of the author expression

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Signed-off-by: Enrico Minack <github@enrico.minack.dev>

Author: EnricoMi

.mergify.yml

@@ -9,6 +9,6 @@ pull_request_rules:
           - "#approved-reviews-by>=2"
           - and: 
             - "#approved-reviews-by>=1"
-            - "author~=^(d80tb7|dave[-]gantenbein|dejanzele|eleanorpratt|geaere|JamesMurkin|mauriceyap|masipauskas|MustafaI|zuqq|richscott|robertdavidsmith|samclark|suprjinx)"
+            - "author~=^(d80tb7|dave[-]gantenbein|dejanzele|eleanorpratt|geaere|JamesMurkin|mauriceyap|masipauskas|MustafaI|zuqq|richscott|robertdavidsmith|samclark|suprjinx|EnricoMi)$"
         title:
-          Two are checks required.
+          Two approvals required, or one if author is a maintainer.