Bump manifold.version from 2024.1.5 to 2024.1.9

Bumps `manifold.version` from 2024.1.5 to 2024.1.9.

Updates `systems.manifold:manifold-javadoc-agent` from 2024.1.5 to 2024.1.9
- [Release notes](https://github.com/manifold-systems/manifold/releases)
- [Changelog](https://github.com/manifold-systems/manifold/blob/master/docs/news.md)
- [Commits](manifold-systems/manifold@v2024.1.5...v2024.1.9)

Updates `systems.manifold:manifold-preprocessor` from 2024.1.5 to 2024.1.9

---
updated-dependencies:
- dependency-name: systems.manifold:manifold-javadoc-agent
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: systems.manifold:manifold-preprocessor
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

pom.xml

@@ -40,7 +40,7 @@
     <maven.compiler.source>${java.version}</maven.compiler.source>
     <maven.compiler.target>${java.version}</maven.compiler.target>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <manifold.version>2024.1.5</manifold.version>
+    <manifold.version>2024.1.9</manifold.version>
   </properties>
 
   <dependencies>