Inaccurate field label for Certificate path in LDAP service configuration form

[FroggyFlox]

Following our rework of LDAP implementation (#2235), we now require the user to provide a path to TLS certificate rather than a URL to the certificate. Unfortunately, the corresponding form label was not updated accordingly in #2235 (my fault). See example below:

This can be rather misleading to the user and should thus be changed to Certificate path rather than "Certificate URL".

[FroggyFlox]

@phillxnet, my apologies for missing something so obvious in my related PR. I'll submit another PR to fix this inaccuracy soon.

[phillxnet]

@FroggyFlox Nice find and apologies from me also for not catching this in the review. Oh well, at least we have it now and it should be a nice little fix to pop in ready for the next Stable channel release.