Fixed issue with 'About Us' link in all relevant pages - issue #647

[viegasnavin]

Describe your changes

About Us anchor was in main index.html page and not in the individual services page.
Fixed it by using relative url '../#about'
The same issue was also present in other services pages:
childTherapy, laughTherapy, readingTherapy, specialTherapy, spirituality, talkingTherapy, yogatherapy

Link to issue

Closes #647

Checklist before requesting a review

• I have performed a self-review of my code.
• Followed the repository's Contributing Guidelines.
• I ran the app and tested it locally to verify that it works as expected.
• I have checked my code with an automatic accessibility tool and it shows no errors.

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[github-actions]

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[Aryan9inja]

The About Link worked fine as I used them.