Update docs conf

[WenjieDu]

What does this PR do?

1. fixing Docs configs should be updated by requested #460;

Before submitting

• This PR is made to fix a typo or improve the docs (you can dismiss the other checks if this is the case).
• Was this discussed/approved via a GitHub issue? Please add a link to it if that's the case.
• I have commented my code, particularly in hard-to-understand areas.

[coveralls]

Pull Request Test Coverage Report for Build 9968394634

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 83.854%

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Totals
Change from base Build 9968206392:	0.0%
Covered Lines:	10423
Relevant Lines:	12430

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💛 - Coveralls