Fix prdoc?

prdoc/pr_4521.prdoc

@@ -6,10 +6,7 @@ doc:
     The broker pallet price adaptation interface is changed to be less opinionated and more
     information is made available to the `AdaptPrice` trait. A new example impl is included which
     adapts the price based not on the number of cores sold, but rather on the price that was
-    achieved during the sale to mitigate a potential price manipulation vector. More information
-    here:
-
-      https://github.com/paritytech/polkadot-sdk/issues/4360
+    achieved during the sale to mitigate a potential price manipulation vector.
 
   - audience: Runtime User
     description: |