Fixed Heading Color for better visibility

[HashTalmiz]

📝 Description

Since the background image was black, changed the text color to white for better visibility

🔧 Fixes #(issue)

175

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📷 Provide related Screenshot/Gifs if any.

Before: After:

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• [x] I have performed a self-review of my own code.
• [x] I'm a contributor in Hacktoberfest'21.

[saloni-15]

hey @HashTalmiz, please provide the screenshot for the same

[HashTalmiz]

@saloni-15 Added