Use IssueLens action from main

[Changyong Gong (chagong)]

Summary

• replace the pinned IssueLens action commit with the main branch
• leave all other action references and workflow behavior unchanged

Validation

• git diff --check
• verified no full-SHA IssueLens action references remain in .github/workflows
• repository has no configured workflow/YAML validator and actionlint is not available locally

[wenyt (wenytang-ms)]

[P2] Increase the caller timeout when adopting the new stream budget

The action at main now allows a 30-minute response stream (microsoft/IssueLens#55), but this workflow still has timeout-minutes: 20. Consequently, a valid long-running request can be canceled by GitHub before the action receives its completion event and saves its response/summary. Please increase the job timeout to 45 minutes alongside this ref change, matching the upstream action timeout guidance, which includes setup/discovery and token-acquisition headroom.

Affected reference: .github/workflows/issuelens-run.yml:38.

[wenyt (wenytang-ms)]

Approved as-is at the maintainer’s explicit request. The maintainer accepts the previously raised caller-timeout concern; this approval supersedes my earlier changes-requested review.