Ra 2.16.8

Includes a performance optimisation to avoid certain many queues
scenarios from timing out after a reboot.

(cherry picked from commit 8a30dd5)

Author: kjnilsson

rabbitmq-components.mk

@@ -51,7 +51,7 @@ dep_khepri_mnesia_migration = hex 0.7.2
 dep_meck = hex 1.0.0
 dep_osiris = git https://github.com/rabbitmq/osiris v1.8.7
 dep_prometheus = hex 4.11.0
-dep_ra = hex 2.16.7
+dep_ra = hex 2.16.8
 dep_ranch = hex 2.2.0
 dep_recon = hex 2.5.6
 dep_redbug = hex 2.0.7