Fix wording of trace_propagation_targets to be correct (#11500)

Author: stayallive

docs/platforms/php/common/configuration/options.mdx

@@ -248,9 +248,8 @@ A function responsible for determining the percentage chance a given transaction
 
 An optional property that controls which downstream services receive tracing data, in the form of a `sentry-trace` and a `baggage` header attached to any outgoing HTTP requests.
 
-The option may contain a list of strings against which the URLs of outgoing requests are matched.
-If one of the entries in the list matches the URL of an outgoing request, trace data will be attached to that request.
-Entries do not have to be full matches, meaning the URL of a request is matched when it _contains_ a string provided through the option.
+The option may contain a list of strings against which the hosts of outgoing requests are matched.
+If one of the entries in the list matches the host of an outgoing request, trace data will be attached to that request.
 
 If <PlatformIdentifier name="trace-propagation-targets" /> is not provided, trace data is attached to every outgoing request from the [instrumented client](../../tracing/instrumentation/requests-module/).
 To disable sending trace data to any downstream service, set this option to an empty array (`[]`).