Bump kotlinx-html-jvm from 0.8.1 to 0.9.1

Bumps [kotlinx-html-jvm](https://github.com/Kotlin/kotlinx.html) from 0.8.1 to 0.9.1.
- [Release notes](https://github.com/Kotlin/kotlinx.html/releases)
- [Commits](https://github.com/Kotlin/kotlinx.html/commits/0.9.1)

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlinx:kotlinx-html-jvm
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

pom.xml

@@ -38,7 +38,7 @@
         <rythm-spring.version>1.2.2</rythm-spring.version>
         <liqp.version>0.8.5.3</liqp.version>
         <kotlin.version>1.8.22</kotlin.version>
-        <kotlinx.html.version>0.8.1</kotlinx.html.version>
+        <kotlinx.html.version>0.9.1</kotlinx.html.version>
     </properties>
 
     <parent>