Fix codespell warning (#812)

Author: frenck

.github/labels.yml

@@ -4,7 +4,7 @@
   description: "A breaking change for existing users."
 - name: "bugfix"
   color: ee0701
-  description: "Inconsistencies or issues which will cause a problem for users or implementors."
+  description: "Inconsistencies or issues which will cause a problem for users or implementers."
 - name: "documentation"
   color: 0052cc
   description: "Solely about the documentation of the project."