Fixed typo in DEVELOPER_GUIDE.md.

[drunken-monkey]

Trivial typo fix. (Sorry if you don’t want such tiny PRs, I tried looking for other typos in .md files but couldn’t find any.)

Check List

• New functionality includes testing.
  • All tests pass
• New functionality has been documented.
  • New functionality has javadoc added
• Failing checks are inspected and point to the corresponding known issue(s) (See: Troubleshooting Failing Builds)
• Commits are signed per the DCO using --signoff
• Commit changes are listed out in CHANGELOG.md file (See: Changelog)
• Public documentation issue/PR created

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For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[github-actions]

Compatibility status:

Checks if related components are compatible with change 2d71ce3

Incompatible components

Incompatible components: [https://github.com/opensearch-project/performance-analyzer.git, https://github.com/opensearch-project/cross-cluster-replication.git, https://github.com/opensearch-project/performance-analyzer-rca.git]

Skipped components

Compatible components

Compatible components: [https://github.com/opensearch-project/asynchronous-search.git, https://github.com/opensearch-project/security-analytics.git, https://github.com/opensearch-project/observability.git, https://github.com/opensearch-project/reporting.git, https://github.com/opensearch-project/notifications.git, https://github.com/opensearch-project/opensearch-oci-object-storage.git, https://github.com/opensearch-project/job-scheduler.git, https://github.com/opensearch-project/custom-codecs.git, https://github.com/opensearch-project/neural-search.git, https://github.com/opensearch-project/common-utils.git, https://github.com/opensearch-project/geospatial.git, https://github.com/opensearch-project/index-management.git, https://github.com/opensearch-project/anomaly-detection.git, https://github.com/opensearch-project/ml-commons.git, https://github.com/opensearch-project/security.git, https://github.com/opensearch-project/k-nn.git, https://github.com/opensearch-project/alerting.git, https://github.com/opensearch-project/sql.git]

[github-actions]

✅ Gradle check result for 2d71ce3: SUCCESS

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (92afd67) 71.40% compared to head (2d71ce3) 71.39%.
Report is 11 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #12051      +/-   ##
============================================
- Coverage     71.40%   71.39%   -0.01%     
+ Complexity    59465    59452      -13     
============================================
  Files          4925     4925              
  Lines        279471   279471              
  Branches      40635    40635              
============================================
- Hits         199558   199536      -22     
- Misses        63298    63309      +11     
- Partials      16615    16626      +11     

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[andrross]

@drunken-monkey Thanks for the contribution!