[CI] Use latest Isaac Sim 6.1 release image

[kellyguo11]

Description

Update the shared CI configuration on release/3.0.0 to use the latest-release-6-1 Isaac Sim image instead of the pinned latest-develop image. This keeps release-branch testing on the Isaac Sim 6.1 release line.

No dependencies are added.

Type of change

• CI configuration

Release backport

• Backport this pull request to the active release branch after it merges into develop (not applicable; this PR targets release/3.0.0 directly)

Screenshots

Not applicable.

Validation

• uv run python YAML/config assertion: passed
• git diff --check: passed
• uv run isaaclab -f: all formatting, lint, YAML, and repository hygiene hooks passed except the changelog-fragment hook. That hook reports pre-existing divergence between release/3.0.0 and the repository's default beta branch; this PR changes no source package or changelog fragment.

Checklist

• I have read and understood the contribution guidelines
• Relevant formatting, lint, and YAML checks pass
• My changes generate no new warnings
• Documentation changes are not required for this CI-only update
• New tests are not required for this configuration-only update
• Changelog fragments are not required because no source package is changed
• My name already exists in CONTRIBUTORS.md

[kellyguo11]

run-ci

[isaaclab-review-bot]

Isaac Lab Review Bot

This CI-only change updates the shared Isaac Sim image reference for release/3.0.0 from a digest-pinned development image to the floating latest-release-6-1 release tag.

• Design and architecture: The shared workflow configuration remains the single source for Isaac Sim image coordinates, and no workflow structure or configuration fan-out is changed. Selecting the 6.1 release line is consistent with the target release branch.
• API: The YAML keys and value types consumed by workflows are unchanged, so the configuration interface remains compatible. No source package, public API, CLI surface, dependency, or release-note-bearing behavior is modified.
• Implementation: The image tag and adjacent explanation are updated consistently. The principal non-blocking tradeoff is reduced reproducibility: unlike the previous digest-pinned reference, the floating release tag may resolve to different images over time, making later CI failure comparisons less exact.

No blocking issues. No inline issue met the actionable-evidence threshold; the assessment above records the review feedback.

Automated review; human maintainers own approval decisions.

[greptile-apps]

Greptile Summary

This PR updates the shared release/3.0.0 CI configuration to test against the moving Isaac Sim 6.1 release image instead of a digest-pinned development image.

• Changes isaacsim_image_tag to latest-release-6-1.
• Updates the adjacent comment to document release-line tracking.
• Introduces no source-code or dependency changes.

Confidence Score: 5/5

The PR appears safe to merge because the configuration change matches its stated release-line tracking intent and no affected workflow contract was found.

The changed tag is consumed as the Isaac Sim base-image version, and the repository’s digest-based dependency-cache calculation accommodates updates behind the moving release tag. The separate nightly pinning workflow targets develop, not the release branch changed here.

Important Files Changed

Filename	Overview
.github/workflows/config.yaml	Switches release-branch CI from a pinned development image to the latest Isaac Sim 6.1 release tag; no actionable issue was identified.

_{Reviews (1): Last reviewed commit: "Use latest Isaac Sim 6.1 release image" | Re-trigger Greptile}