Remove early reslease cycles dependency as public preview annunced

[Huodong-Yuan]

After public preview of this feature announced in https://www.microsoft.com/en-us/power-platform/blog/power-apps/introducing-git-integration-in-power-platform-preview/, this early access no longer needed. In actual, I can see this feature in Standard environments now.

[learn-build-service-prod]

Learn Build status updates of commit bc34046:

✅ Validation status: passed

File	Status	Preview URL	Details
power-platform/alm/git-integration/connecting-to-git.md	✅Succeeded

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