MINOR: [C++][Docs] Fix typos in compute document

[cakiki]

No description provided.

[github-actions]

Thanks for opening a pull request!

If this is not a minor PR. Could you open an issue for this pull request on GitHub? https://github.com/apache/arrow/issues/new/choose

Opening GitHub issues ahead of time contributes to the Openness of the Apache Arrow project.

Then could you also rename the pull request title in the following format?

GH-${GITHUB_ISSUE_ID}: [${COMPONENT}] ${SUMMARY}

or

MINOR: [${COMPONENT}] ${SUMMARY}

In the case of PARQUET issues on JIRA the title also supports:

PARQUET-${JIRA_ISSUE_ID}: [${COMPONENT}] ${SUMMARY}

See also:

• Other pull requests
• Contribution Guidelines - How to contribute patches

[kou]

+1

Good catch!

[ursabot]

Benchmark runs are scheduled for baseline = 0e1f5c6 and contender = 7c307b1. 7c307b1 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 ⬇️0.56% ⬆️0.0%] test-mac-arm
[Finished ⬇️0.0% ⬆️0.0%] ursa-i9-9960x
[Failed ⬇️0.0% ⬆️0.0%] ursa-thinkcentre-m75q
Buildkite builds:
[Finished] 7c307b14 ec2-t3-xlarge-us-east-2
[Failed] 7c307b14 test-mac-arm
[Finished] 7c307b14 ursa-i9-9960x
[Failed] 7c307b14 ursa-thinkcentre-m75q
[Finished] 0e1f5c6c ec2-t3-xlarge-us-east-2
[Failed] 0e1f5c6c test-mac-arm
[Finished] 0e1f5c6c ursa-i9-9960x
[Failed] 0e1f5c6c 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