Update gunicorn config to improve sheepdog's responsiveness

[nss10]

Link to JIRA ticket if there is one: MIDRC-946

Improvements

• Add more workers to sheepdog's gunicorn server to improve responsiveness during bottlenecks

[github-actions]

The style in this PR agrees with black. ✔️

This formatting comment was generated automatically by a script in uc-cdis/wool.

[coveralls]

Pull Request Test Coverage Report for Build 13844556545

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 62.431%

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Totals
Change from base Build 13812991300:	0.0%
Covered Lines:	2373
Relevant Lines:	3801

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💛 - Coveralls

[github-actions]

filepath	$$\textcolor{#23d18b}{\tt{passed}}$$	$$\textcolor{#ffa500}{\tt{skipped}}$$	SUBTOTAL
$$\textcolor{#ffa500}{\tt{tests/test\_graph\_submit\_and\_query.py}}$$	$$\textcolor{#23d18b}{\tt{13}}$$	$$\textcolor{#ffa500}{\tt{1}}$$	$$\textcolor{#ffa500}{\tt{14}}$$
$$\textcolor{#ffa500}{\tt{tests/test\_data\_upload.py}}$$	$$\textcolor{#23d18b}{\tt{8}}$$	$$\textcolor{#ffa500}{\tt{1}}$$	$$\textcolor{#ffa500}{\tt{9}}$$
$$\textcolor{#ffa500}{\tt{TOTAL}}$$	$$\textcolor{#23d18b}{\tt{21}}$$	$$\textcolor{#ffa500}{\tt{2}}$$	$$\textcolor{#ffa500}{\tt{23}}$$

Please find the detailed integration test report here

Please find the ci env pod logs here