Update documentation to use more inclusive language

[breautek]

Related to apache/cordova#218

Offending pages:

• https://cordova.apache.org/docs/en/latest/guide/appdev/whitelist/index.html
• https://cordova.apache.org/docs/en/latest/reference/cordova-plugin-whitelist/index.html
• https://cordova.apache.org/docs/en/latest/guide/appdev/security/index.html

[timbru31]

I guess, we would need to come up with some sort of redirection?

[breautek]

I guess, we would need to come up with some sort of redirection?

That would be ideal...

[breautek]

Completed by #1142