Reword changelog entry

Author: vy

src/changelog/.2.x.x/3790_allow-resource-protocol.xml

@@ -7,6 +7,6 @@
        type="fixed">
   <issue id="3790" link="https://github.com/apache/logging-log4j2/issues/3790"/>
   <description format="asciidoc">
-    Allow `resource:` protocol for configuration files by default.
+    Allow `resource:` protocol for configuration files by default, if the current runtime is GraalVM.
   </description>
 </entry>