Update devenv-maxoccurs-property.md

[gdrgdev]

Misspelled the word "occurrences."

[learn-build-service-prod]

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[SusanneWindfeldPedersen]

Thanks for the feedback. This fix is inside the DO-NOT-EDIT section of the autogenerated reference documentation and this must be fixed in the source code instead, so we cannot take in your PR for this. We'll close it and fix it in our source code repo instead. Thanks!