Bump httpcore from 4.4.14 to 4.4.15

Bumps httpcore from 4.4.14 to 4.4.15.

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

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

pom.xml

@@ -270,7 +270,7 @@ under the License.
     <dependency>
       <groupId>org.apache.httpcomponents</groupId>
       <artifactId>httpcore</artifactId>
-      <version>4.4.14</version>
+      <version>4.4.15</version>
     </dependency>
 
     <dependency>