Fix broken contributing doc

[Jeffwan]

What this PR does / why we need it:
Seems there're a few breaking changes recently and contributing doc is broken.

Which issue(s) this PR fixes:
Fixes #436

Does this PR introduce a user-facing change?:
NONE

Fix broken contributing doc

[feast-ci-bot]

Hi @Jeffwan. Thanks for your PR.

I'm waiting for a gojek member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[woop]

Thanks for the contribution @Jeffwan!

[woop]

/lgtm

[Jeffwan]

/hold

Please do not merge and this is in progress.

[woop]

/hold

Please do not merge and this is in progress.

Noted!

[Jeffwan]

@woop Please have another review.

[woop]

@Jeffwan would you mind removing the hold? I am assuming you are ready to merge :)

[Jeffwan]

/hold cancel

[Jeffwan]

@woop Yeah, I just remove it. Thanks for reminder.

[khorshuheng]

/ok-to-test

[woop]

/lgtm
/approved

[feast-ci-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Jeffwan, woop

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