Fix regex in triage.yml to support label names with spaces

[mch2]

Description

Fix regex in triage.yml so that issue labels with spaces are auto assigned.

Related Issues

N/A

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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[github-actions]

Compatibility status:

Checks if related components are compatible with change 7e04162

Incompatible components

Skipped components

Compatible components

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

[github-actions]

✅ Gradle check result for 7e04162: SUCCESS

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (074bc6a) 71.31% compared to head (7e04162) 71.38%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #11618      +/-   ##
============================================
+ Coverage     71.31%   71.38%   +0.06%     
- Complexity    59155    59215      +60     
============================================
  Files          4906     4906              
  Lines        278178   278178              
  Branches      40421    40421              
============================================
+ Hits         198388   198582     +194     
+ Misses        63260    63101     -159     
+ Partials      16530    16495      -35     

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