Bump httpcore.version from 4.4.14 to 4.4.15

Bumps `httpcore.version` from 4.4.14 to 4.4.15.

Updates `httpcore` from 4.4.14 to 4.4.15

Updates `httpcore-osgi` 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
- dependency-name: org.apache.httpcomponents:httpcore-osgi
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/pom.xml b/pom.xml
index 58bf069..3b36870 100644
--- a/pom.xml
+++ b/pom.xml
@@ -508,7 +508,7 @@
         <geronimo.spec.jaxws.version>1.2</geronimo.spec.jaxws.version>
         <google.gson.version>2.8.9</google.gson.version>
         <groovy.version>3.0.9</groovy.version>
-        <httpcore.version>4.4.14</httpcore.version>
+        <httpcore.version>4.4.15</httpcore.version>
         <httpclient.version>4.5.13</httpclient.version>
         <httpmime.version>4.5.13</httpmime.version>
         <intellij.version>5.0</intellij.version>