Update Footer Section Color for Enhanced Visual Experience

[ShaikHafiza]

The current footer color in home page (index.html) could be improved for better user experience and visual aesthetics. A more distinct color or contrast may make the footer stand out, enhancing overall site design and readability.

@GarimaSingh0109 Please assign this issue to me. I'll complete this as fast as possible.

please, don't forget to label the levels, gssoc, hacktoberfest.