add year in the footer which will change automatically every year

[Rajatkumarbehera11]

Fixes Issue

Changes proposed

Check List (Check all the applicable boxes)

• [x] My code follows the code style of this project.
• [x] My change requires changes to the documentation.
• [x] I have updated the documentation accordingly.
• [x] All new and existing tests passed.

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[ShwetKhatri2001]

Create an issue first mentioning the kind of changes you want to make and then raise a PR.

[ShwetKhatri2001]

@Rajatkumarbehera11 You need to complete this if you're looking to get it merged.