fix: startsWith not a function error [INS-3640]

[CurryYangxx]

Close #7164

ErrorMessage

Reason

The version field in yaml should be string type, but even if you enter numbers, you can save them, although an error will be reported. The `spec.info.version` may be string type or number, so we need to covert to string type when it has value.

[jackkav]

Nice job! Thanks