Remove "en-us" from links so they automatically redirect to the right localization

[AlexJerabek]

Adding language and country to docs.microsoft.com links causes them to ignore a user's local settings. Removing that part of the URL will let them resolve to the proper translation for that user.

Thank you for your pull request. Please provide the following information.

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1. Do these changes impact User Experience? (e.g., how the user interacts with Yo Office and/or the files and folders the user sees in the project that Yo Office creates)

   • [x] Yes
   • [ ] No

   If Yes, briefly describe what is impacted. A different URL is displayed after running yo office.

2. Do these changes impact documentation? (e.g., a tutorial on https://docs.microsoft.com/en-us/office/dev/add-ins/overview/office-add-ins)

   • [ ] Yes
   • [x] No

   If Yes, briefly describe what is impacted.

3. Validation/testing performed:

   Describe manual testing done.

4. Platforms tested:

   • [ ] Windows
   • [ ] Mac

[igor-ribeiiro]

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