Add plural for correction: reurn->return

Found the misspelling "reurns" in a personal projects as in:
"It reurns ..."

The mistake could also be a typo for "rerun", so include that as a
potential fix too.

codespell_lib/data/dictionary.txt

@@ -51107,7 +51107,10 @@ reuqirement->requirement
 reuqirements->requirements
 reuqires->requires
 reuqiring->requiring
-reurn->return
+reurn->return, rerun,
+reurned->returned, reran,
+reurning->returning, rerunning,
+reurns->returns, reruns,
 reursively->recursively
 reuseable->reusable
 reusin->reusing, resin,