Inaccurate taint flag documentation

[luisdavim]

Is this a BUG REPORT or FEATURE REQUEST?:

Bug report

What happened:

The documentation on --reap-tainted doesn't seem to be correct

What you expected to happen:

The documentation should be accurate

How to reproduce it (as minimally and precisely as possible):

the documentation says:

"marks nodes with a given taint reapable, must be in format of comma separated taints key=value:effect, key:effect or key"

But this flag seems to be using StringArrayVar that means we need to pass the flag multiple times instead of a comma separated string, see: https://pkg.go.dev/github.com/spf13/pflag#StringArrayVar

StringArrayVar defines a string flag with specified name, default value, and usage string. The argument p points to a []string variable in which to store the value of the flag. The value of each argument will not try to be separated by comma. Use a StringSlice for that.