Fix typo in Range.xml

[stevemonaco]

Summary

One occurrence of "does't" was fixed.

[dotnet-policy-service[bot]]

Tagging subscribers to this area: @dotnet/area-system-runtime

[learn-build-service-prod[bot]]

Learn Build status updates of commit 111b662:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
xml/System/Range.xml	:white_check_mark:Succeeded	View

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