services: Adjust the jami service for the upgraded jami....* gnu/services/telephony.scm (jami-configuration)[jamid]: Rename libring to
libjami.
* gnu/services/telephony.scm
(jami-configuration->command-line-arguments): Adjust daemon file name.
* gnu/services/telephony.scm (jami-service-type): Adjust doc.
* gnu/tests/telephony.scm (run-jami-test): Check for 'jamid' process, not
'dring'.
* doc/guix.texi (Telephony Services): Adjust doc for the jami-qt to jami and
libring to libjami packages renaming.