Bump simpleclient_hotspot from 0.9.0 to 0.10.0 (#742)

Bumps [simpleclient_hotspot](https://github.com/prometheus/client_java) from 0.9.0 to 0.10.0.
- [Release notes](https://github.com/prometheus/client_java/releases)
- [Commits](https://github.com/prometheus/client_java/compare/parent-0.9.0...parent-0.10.0)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

uhabits-server/build.gradle.kts

@@ -45,7 +45,7 @@ dependencies {
     implementation("org.jetbrains:kotlin-css-jvm:1.0.0-pre.143-kotlin-1.4.21")
     implementation("io.prometheus:simpleclient:0.10.0")
     implementation("io.prometheus:simpleclient_httpserver:0.10.0")
-    implementation("io.prometheus:simpleclient_hotspot:0.9.0")
+    implementation("io.prometheus:simpleclient_hotspot:0.10.0")
     testImplementation("io.ktor:ktor-server-tests:$ktorVersion")
     testImplementation("org.mockito:mockito-core:2.28.2")
     testImplementation("com.nhaarman.mockitokotlin2:mockito-kotlin:2.2.0")