GH-14918: [Docs] Make changes to developers section of the docs (Jira -> GitHub)

[AlenkaF]

This PR is part of the work to update the documentation as we are moving from Jira issue tracker to GitHub issues:
#14822

• Closes: [Docs] Make changes to developers section of the docs (Jira -> GitHub) #14918

[github-actions]

• Closes: [Docs] Make changes to developers section of the docs (Jira -> GitHub) #14918

[github-actions]

⚠️ GitHub issue #14918 has been automatically assigned in GitHub to PR creator.

[pitrou]

@jorisvandenbossche Do you want to comment on this?

[ursabot]

Benchmark runs are scheduled for baseline = b48a230 and contender = 053080d. 053080d is a master commit associated with this PR. Results will be available as each benchmark for each run completes.
Conbench compare runs links:
[Finished ⬇️0.0% ⬆️0.0%] ec2-t3-xlarge-us-east-2
[Failed] test-mac-arm
[Finished ⬇️0.0% ⬆️0.0%] ursa-i9-9960x
[Finished ⬇️0.21% ⬆️0.03%] ursa-thinkcentre-m75q
Buildkite builds:
[Finished] 053080dc ec2-t3-xlarge-us-east-2
[Failed] 053080dc test-mac-arm
[Finished] 053080dc ursa-i9-9960x
[Finished] 053080dc ursa-thinkcentre-m75q
[Finished] b48a230e ec2-t3-xlarge-us-east-2
[Failed] b48a230e test-mac-arm
[Finished] b48a230e ursa-i9-9960x
[Finished] b48a230e ursa-thinkcentre-m75q
Supported benchmarks:
ec2-t3-xlarge-us-east-2: Supported benchmark langs: Python, R. Runs only benchmarks with cloud = True
test-mac-arm: Supported benchmark langs: C++, Python, R
ursa-i9-9960x: Supported benchmark langs: Python, R, JavaScript
ursa-thinkcentre-m75q: Supported benchmark langs: C++, Java

[ursabot]

['Python', 'R'] benchmarks have high level of regressions.
ursa-i9-9960x