Addition of dependabot.yml file

[DivyanshiNarang]

We need to add dependabot.yml file as it helps us to keep our dependencies up to date. Every day, it checks your dependency files for outdated requirements and opens individual PRs for any it finds.

@avinashkranjan please assign me this issue under gssoc'23.

[github-actions]

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[Drishtianand19]

We need to add dependabot.yml file as it helps us to keep our dependencies up to date. Every day, it checks your dependency files for outdated requirements and opens individual PRs for any it finds.

@avinashkranjan please assign me this issue under gssoc'23.

[avinashkranjan]

Go Ahead @DivyanshiNarang