ci: skip publish step if no release is needed

[zimeg]

Summary

This pull request skips the publish step if no release is needed.

Fixes an issue where publishing is attempted after a recent release but no changesets exist. The "changelog" PR wasn't created so publishing was attempted! This didn't cause problems but requires unneeded approval.

Mirrors slackapi/bolt-js#2894.

Requirements

• I've read and understood the Contributing Guidelines and have done my best effort to follow them.
• I've read and agree to the Code of Conduct.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 19bbe2d

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.86%. Comparing base (91d55b3) to head (19bbe2d).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #599   +/-   ##
=======================================
  Coverage   99.86%   99.86%           
=======================================
  Files           7        7           
  Lines         718      718           
=======================================
  Hits          717      717           
  Misses          1        1           

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[zimeg]

🚢 Matches the patterns of an individual project release so will merge now ⚡