[MPLUGIN-458] Bump httpcore from 4.4.15 to 4.4.16 (#185)

Bumps httpcore from 4.4.15 to 4.4.16.

---
updated-dependencies:
- dependency-name: org.apache.httpcomponents:httpcore
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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maven-plugin-tools-api/pom.xml

@@ -67,7 +67,7 @@
     <dependency>
       <groupId>org.apache.httpcomponents</groupId>
       <artifactId>httpcore</artifactId>
-      <version>4.4.15</version>
+      <version>4.4.16</version>
     </dependency>
     <!-- wagon for proxy related classes -->
     <dependency>