SUBMARINE-1392. Modify the description of creating a jira account in the documentation

[cdmikechen]

What is this PR for?

Modify the documentation in the jira account creation section. Link: https://submarine.apache.org/docs/next/community/contributing#step3-create-a-new-jira-in-submarine-project

What type of PR is it?

Documentation

Todos

• [x] - jira account creation document

What is the Jira issue?

https://issues.apache.org/jira/browse/SUBMARINE-1392

How should this be tested?

NA

Screenshots (if appropriate)

Questions:

• Do the license files need updating? No
• Are there breaking changes for older versions? No
• Does this need new documentation? No

[codecov[bot]]

Codecov Report

Merging #1091 (e4e8968) into master (cae0c62) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1091   +/-   ##
=======================================
  Coverage   67.27%   67.27%           
=======================================
  Files         128      128           
  Lines        6224     6224           
=======================================
  Hits         4187     4187           
  Misses       2037     2037           

Flag	Coverage Δ
python-integration	54.20% <ø> (ø)
python-unit	48.00% <ø> (ø)

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