Update dependency io.micrometer:micrometer-registry-prometheus to v1.16.5 (#168)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

backend/gradle/libs.versions.toml

@@ -13,7 +13,7 @@ kotlinx_coroutines = "1.10.2"
 kotlinx_serialization = "1.11.0"
 ktor = "3.4.2"
 logback = "1.5.32"
-prometheus = "1.16.4"
+prometheus = "1.16.5"
 serialization = "2.3.20"
 release = "3.1.0"