Update Ra dependency to 2.15.0

Khepri v0.17 needs a change in Ra 2.15.0 that exposes more data in the
`ra_aux` API.

Author: the-mikedavis

MODULE.bazel

@@ -253,8 +253,8 @@ erlang_package.hex_package(
     name = "ra",
     build_file = "@rabbitmq-server//bazel:BUILD.ra",
     pkg = "ra",
-    sha256 = "1d553dd971a0b398b7af0fa8c8458dda575715ff71c65c972e9500b24039b240",
-    version = "2.14.0",
+    sha256 = "cfc0dbe5ebbd54f44081f95ea6a1daeb28a89df82aa9baa234f68abbb36bdc67",
+    version = "2.15.0",
 )
 
 erlang_package.git_package(

rabbitmq-components.mk

@@ -50,7 +50,7 @@ dep_khepri = hex 0.16.0
 dep_khepri_mnesia_migration = hex 0.7.1
 dep_osiris = git https://github.com/rabbitmq/osiris v1.8.5
 dep_prometheus = hex 4.11.0
-dep_ra = hex 2.14.0
+dep_ra = hex 2.15.0
 dep_ranch = hex 2.1.0
 dep_recon = hex 2.5.6
 dep_redbug = hex 2.0.7