Fix: corosync: fix linknumber validation (#1546)

[nicholasyang2022]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 70.18%. Comparing base (af15166) to head (aec7ae9).
Report is 5 commits behind head on master.

Files with missing lines	Patch %	Lines
crmsh/ui_corosync.py	0.00%	1 Missing ⚠️

Additional details and impacted files

Flag	Coverage Δ
integration	55.19% <75.00%> (ø)
unit	52.72% <75.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
crmsh/corosync.py	87.64% <100.00%> (ø)
crmsh/ui_corosync.py	76.79% <0.00%> (ø)

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