Updated Hero Section Text with Relevant Fitness Content

[akshay0611]

This PR enhances the hero section by replacing placeholder text with a more compelling fitness-related message. The new content improves clarity, user engagement, and aligns with the website’s theme.

Changes:

• Updated the hero section text with a motivational message encouraging fitness and personal growth.
• Improved alignment with the brand’s vision and target audience.
• Maintained consistency in styling and formatting.

Fixes: #15