Bump httpcore from 4.4.6 to 4.4.16

Bumps httpcore from 4.4.6 to 4.4.16.

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

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

Author: dependabot[bot]

dubbo-dependencies-bom/pom.xml

@@ -99,7 +99,7 @@
         <mina_version>2.1.5</mina_version>
         <grizzly_version>2.4.4</grizzly_version>
         <httpclient_version>4.5.13</httpclient_version>
-        <httpcore_version>4.4.6</httpcore_version>
+        <httpcore_version>4.4.16</httpcore_version>
         <fastjson_version>1.2.83</fastjson_version>
         <fastjson2_version>2.0.23</fastjson2_version>
         <zookeeper_version>3.4.14</zookeeper_version>