Fix children paths in how-tos index

[RajeevJaryal]

Updated the how-tos index front-matter to use relative children paths instead of absolute paths. This aligns with GitHub Docs conventions and ensures correct sidebar navigation and page linking.

Why:

The sidebar navigation for the How-tos section was not working as expected because the children entries in the front-matter used absolute paths. GitHub Docs requires relative paths for section children. Updating these paths fixes navigation issues and ensures the section renders correctly.

Closes: N/A

What's being changed (if available, include any code snippets, screenshots, or gifs):

Updated the front-matter in docs/content/account-and-profile/how-tos/index.md by replacing absolute child paths with relative paths to follow GitHub Docs conventions and restore correct sidebar navigation.

Check off the following:

• A subject matter expert (SME) has reviewed the technical accuracy of the content in this PR.
• The changes in this PR meet the docs fundamentals that are required for all content.
• All CI checks are passing and the changes look good in the review environment.

[github-actions]

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Source	Review	Production	What Changed
account-and-profile/how-tos/index.md	fpt ghec ghes@ 3.19 3.18 3.17 3.16 3.15 3.14	fpt ghec ghes@ 3.19 3.18 3.17 3.16 3.15 3.14

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