chore(deps): update dependency openvox-server to v8.12.0-1+ubuntu24.04

Author: renovate[bot]

build_versions.yaml

@@ -2,7 +2,7 @@
 include:
   - release: 8
     # renovate: depName=openvox-server openVoxRelease=8
-    server_version: "8.11.0-1+ubuntu24.04"
+    server_version: "8.12.0-1+ubuntu24.04"
     # renovate: depName=openvoxdb openVoxRelease=8
     db_version: "8.11.0-1+ubuntu24.04"
     r10k_version: "5.0.0"