build(deps): bump io.micrometer:micrometer-core from 1.13.4 to 1.13.5

Bumps [io.micrometer:micrometer-core](https://github.com/micrometer-metrics/micrometer) from 1.13.4 to 1.13.5.
- [Release notes](https://github.com/micrometer-metrics/micrometer/releases)
- [Commits](micrometer-metrics/micrometer@v1.13.4...v1.13.5)

---
updated-dependencies:
- dependency-name: io.micrometer:micrometer-core
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

backend/build.gradle.kts

@@ -53,7 +53,7 @@ dependencies {
     implementation("org.flywaydb:flyway-database-postgresql")
     implementation("org.springframework.session:spring-session-core")
 
-    implementation("io.micrometer:micrometer-core:1.13.4")
+    implementation("io.micrometer:micrometer-core:1.13.5")
     implementation("io.micrometer:micrometer-registry-prometheus:1.13.5")
     implementation("net.ttddyy.observation:datasource-micrometer:1.0.5")