Changed the colour of featured section regarding issue

[AditiSingh2003]

🛠️ Fixes Issue : "#117"

👨‍💻 Changes proposed:

Changed the color of the text in offer section

As previously it was hard to read the text of a section. By changing some color it is now readable

✔️ Check List (Check all the applicable boxes)

• [x] My code follows the code style of this project.
• [x] This PR does not contain plagiarized content.
• [x] The title of my pull request is a short description of the requested changes.
• [x] I am a participant of Hacktoberfest 2022.

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