Invert the LDAP example on the README page so that the YAML goes first

[oleg-nenashev]

Currently the plugin site and other pages display a Web UI configuration screenshot for a plugin which is supposed to be about JCaaC. It would be great to have a YAML configuration snippet as a first item, and LDAP screenshot can be added as "was" example later, maybe even in a section which is collapsed by default

[wpater]

I'll do it.

[timja]

Resolved in above commit

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