Fix link to Fabric Bot (#9988)

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## Summary of the Pull Request
👋 Just a minor change to fix an outdated link.

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## References
N/A - subject matter expert

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## PR Checklist
* [ ] Closes #xxx
* [ ] CLA signed. If not, go over [here](https://cla.opensource.microsoft.com/microsoft/Terminal) and sign the CLA
* [ ] Tests added/passed
* [ ] Documentation updated. If checked, please file a pull request on [our docs repo](https://github.com/MicrosoftDocs/terminal) and link it here: #xxx
* [ ] Schema updated.
* [ ] I've discussed this with core contributors already. If not checked, I'm ready to accept this work might be rejected in favor of a different grand plan. Issue number where discussion took place: #xxx

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## Detailed Description of the Pull Request / Additional comments
Original link was demised late 2020. Updated link to be correct.

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## Validation Steps Performed

.github/actions/spelling/expect/expect.txt

@@ -755,6 +755,7 @@ EXSTYLE
 EXTENDEDEDITKEY
 EXTKEY
 EXTTEXTOUT
+fabricbot
 facename
 FACENODE
 FACESIZE

doc/bot.md

@@ -127,4 +127,4 @@ When a release is created, if the PR ID number is linked inside the release desc
 - Issue message: 🎉This issue was addressed in #{pull request ID}, which has now been successfully released as {release name} {release version}.🎉"
 
 ## Admin Panel
-[Here](https://fabric-cp.azurewebsites.net/bot/)
+[Here](https://portal.fabricbot.ms/bot/?repo=microsoft/terminal)