fix(mesh): correct graspologic ImportError log message — no restart needed after #4924 (#4936)

[mrveiss]

Closes #4936

Summary

• After discovery(mesh): clustering loop has no restart path after graspologic ImportError — requires full app restart #4924 changed the ImportError handler to retry in 24h instead of permanently exiting, the log message still said "restart to enable" — giving operators incorrect recovery instructions
• Changed to "Install with: pip install graspologic. Retrying in 24h."
• Updated matching string in community_clusterer_test.py

Tests

• Existing test assertions still pass with updated message