Added hovering effect in the main.html file

[ritikaaaa177]

fixes issue #212

Describe the changes you've made

1. I used transition and transform in 'fill them'
   
   heading in main.html file
2. I added hovering effect so that whenever one hovers it it scales to the time frame of 0.5s

Type of change

What sort of change have you made:

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, local variables)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

I used live server to verify the changes i made.

Checklist:

• My code follows the guidelines of this project.
• I have performed a self-review of my own code.
• I have commented my code, particularly wherever it was hard to understand.
• I have made corresponding changes to the documentation.

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[github-actions]

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