[AWS] Remove duplicated number_of_workers settings from the custom logs integration (part 2)

[zmoog]

What does this PR do?

Update the changelog to release a new version of the Custom AWS Logs integration.

In the previous PR, missed updating the changelog before merging the PR 🤦 ; the whole purpose of this PR is to release #7319.

Checklist

• I have added an entry to my package's changelog.yml file.

[elasticmachine]

💚 Build Succeeded

the below badges are clickable and redirect to their specific view in the CI or DOCS

Expand to view the summary

Build stats

• Start Time: 2023-08-21T22:55:52.235+0000

• Duration: 17 min 57 sec

Test stats 🧪

Test	Results
Failed	0
Passed	3
Skipped	0
Total	3

🤖 GitHub comments

Expand to view the GitHub comments

To re-run your PR in the CI, just comment with:

• /test : Re-trigger the build.

[elasticmachine]

🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (0/0)	💚
Files	100.0% (0/0)	💚 3.362
Classes	100.0% (0/0)	💚 3.362
Methods	100.0% (3/3)	💚 8.084
Lines	100.0% (0/0)	💚 11.67
Conditionals	100.0% (0/0)	💚

[elasticmachine]

Package aws_logs - 0.5.1 containing this change is available at https://epr.elastic.co/search?package=aws_logs