chore(telemetry): update endpoint and readme

[IgnacioBecerra]

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Summary

This PR updates the endpoint within each package's telemetry.yml file with the new stable endpoint for the collector. Also, this updates the wording used in the telemetry notice under each README.

Change List (commits, features, bugs, etc)

• telemetry.yml endpoint to new stable endpoint
• updated wording under telemetry notice in each README

Acceptance Test (how to verify the PR)

• N/A

Regression Test (how to make sure this PR doesn't break old functionality)

• N/A

Things to look for during review

• [ ] Make sure all references to iot or bx class prefix is using the prefix variable
• [ ] (React) All major areas have a data-testid attribute. New test ids should have test written to ensure they are not changed or removed.
• [ ] UI should be checked in RTL mode to ensure the proper handling of layout and text.
• [ ] All strings should be translatable.
• [ ] The code should pass a11y scans (The storybook a11y knob should show no violations). New components should have a11y test written.
• [ ] Unit test should be written and should have a coverage of 90% or higher in all areas.
• [ ] All components should be passing visual regression test. For new styles or components either a visual regression test should be written for all permutations or the base image updated.
• [ ] Changes or new components should either write new or update existing documentation.
• [ ] PR should link and close out an existing issue

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