Update httpcore5 to 5.4.2 (#6862)

Author: debora-ito

.changes/next-release/feature-Apache5HTTPClient-eeb5570.json

@@ -0,0 +1,6 @@
+{
+    "type": "feature",
+    "category": "Apache 5 HTTP Client",
+    "contributor": "",
+    "description": "Update `httpcore5` to `5.4.2`."
+}

pom.xml

@@ -189,7 +189,7 @@
         <httpcomponents.httpclient.version>4.5.13</httpcomponents.httpclient.version>
         <httpcomponents.httpcore.version>4.4.16</httpcomponents.httpcore.version>
         <httpcomponents.client5.version>5.6</httpcomponents.client5.version>
-        <httpcomponents.core5.version>5.4.1</httpcomponents.core5.version>
+        <httpcomponents.core5.version>5.4.2</httpcomponents.core5.version>
         <!-- Reactive Streams version -->
         <reactive-streams.version>1.0.4</reactive-streams.version>