Bump actions/checkout to v3

[uhooi]

References

• https://github.com/actions/checkout/releases/tag/v3.0.0
• https://twitter.com/the_uhooi/status/1498802416833396736

[github-actions]

👋 Thanks for reporting!
Please PR :)

[Rishi Kumar Ray]

do we have to simply change to v3?

[uhooi]

@RishiKumarRay
Yes.
Is there a problem?

[Rishi Kumar Ray]

@uhooi it looks easy so that's why i asked , can i go for PR? @uhooi

[uhooi]

@RishiKumarRay OK, thx!!

[Rishi Kumar Ray]

@uhooi please review