Bump vuetify from 3.7.4 to 3.7.6 in /src/ECER.Clients.RegistryPortal/ecer.clients.registryportal.client

Bump vuetify from 3.7.4 to 3.7.6 in /src/ECER.Clients.RegistryPortal/ecer.clients.registryportal.client #1792