minor #16131 Fix small typos on Core Team page (welcoMattic)

This PR was submitted for the 5.3 branch but it was merged into the 4.4 branch instead.

Discussion
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Fix small typos on Core Team page

Not sure about the base branch for this type of fix.

Commits
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5473e5e Fix small typos on Core Team page

Author: javiereguiluz

contributing/code/core_team.rst

@@ -156,8 +156,8 @@ A pull request **can be merged** if:
 
 * Enough time was given for peer reviews;
 
-* At least two **Merger Team** members voted ``+1`` (only one if the submitter
-  is part of the Merger team) and no Core member voted ``-1`` (via GitHub
+* At least two **Mergers Team** members voted ``+1`` (only one if the submitter
+  is part of the Mergers team) and no Core member voted ``-1`` (via GitHub
   reviews or as comments).
 
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