web/admin: don't mark property mappings as required anywhere (#8752)

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

web/src/admin/sources/ldap/LDAPSourceForm.ts

@@ -253,7 +253,6 @@ export class LDAPSourceForm extends BaseSourceForm<LDAPSource> {
                 <div slot="body" class="pf-c-form">
                     <ak-form-element-horizontal
                         label=${msg("User Property Mappings")}
-                        ?required=${true}
                         name="propertyMappings"
                     >
                         <select class="pf-c-form-control" multiple>