fix: instanceCap should be podTemplate field

[zoumo]

No description provided.

[carlossg]

I don't think instanceCap is even used in the pipeline syntax

[zoumo]

@carlossg
Yes, the instanceCap field now is useless in the pipeline syntax.

But there is an field instanceCapStr in jenkins globle settings that will change the true instanceCap field in podTemplate.

So I think instanceCap in pipeline should be podTemplate level field not containerTemplate level field
even if it is not effective

Thanks

[carlossg]

I've removed it from the example as it doesn't work there