Fix typo in Javadoc snippet of AsyncRequestBody.forBlockingOutputStream

[KENNYSOFT]

Motivation and Context

I found a typo and would like to correct it. Fixes #6141

Modifications

Correct return type of AsyncRequestBody.forBlockingOutputStream

Testing

N/A

Screenshots (if appropriate)

N/A

However, I encountered a local test failure due to the throwable message i18n, which seems to be from the OS:

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

Checklist

• I have read the CONTRIBUTING document
• Local run of mvn install succeeds
• My code follows the code style of this project
• My change requires a change to the Javadoc documentation
• I have updated the Javadoc documentation accordingly
• I have added tests to cover my changes
• All new and existing tests passed
• I have added a changelog entry. Adding a new entry must be accomplished by running the scripts/new-change script and following the instructions. Commit the new file created by the script in .changes/next-release with your changes.
• My change is to implement 1.11 parity feature and I have updated LaunchChangelog

License

• I confirm that this pull request can be released under the Apache 2 license

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[dagnir]

@all-contributors please add @KENNYSOFT for doc

[allcontributors]

@dagnir

I've put up a pull request to add @KENNYSOFT! 🎉