Fix wrong URL in link for sampling.mdx (#5279)

* Fix wrong URL in link for sampling.mdx

The link to the "Connecting Services" page was for the JavaScript docs, not the Python docs.

* updated link to platform link for common connect services page

* add missing slash

* added platform sections for connecting services links

Co-authored-by: Isabel <76437239+imatwawana@users.noreply.github.com>
Co-authored-by: Isabel Matwawana <isabel@matwawana.com>

Author: saifmode

src/platforms/common/configuration/sampling.mdx

@@ -104,9 +104,19 @@ When using custom instrumentation to create a transaction, you can add data to t
 
 ## Inheritance
 
-<!-- TODO: the link in the paragraph below is intentionally hard-coded to point at JS, since for now that's where the information lives -->
+Whatever a transaction's sampling decision, that decision will be passed to its child spans and from there to any transactions they subsequently cause in other services.
 
-Whatever a transaction's sampling decision, that decision will be passed to its child spans and from there to any transactions they subsequently cause in other services. (See [Connecting Services](/platforms/javascript/performance/) for more about how that propagation is done.)
+<PlatformSection notSupported={["javascript.cordova", "php"]}>
+
+(See <PlatformLink to="/performance/connect-services/">Connecting Services</PlatformLink> for more about how that propagation is done.)
+
+</PlatformSection>
+
+<PlatformSection supported={["php.laravel"]}>
+
+(See [Connecting Services](/platforms/php/guides/laravel/performance/connect-services/) for more about how that propagation is done.)
+
+</PlatformSection>
 
 If the transaction currently being created is one of those subsequent transactions (in other words, if it has a parent transaction), the upstream (parent) sampling decision will always be included in the sampling context data, so that your <PlatformIdentifier name="traces-sampler" /> can choose whether and when to inherit that decision. (In most cases, inheritance is the right choice, to avoid partial traces.)