doc: update prdoc

prdoc/pr_6643.prdoc

@@ -6,7 +6,7 @@ doc:
     The local chain doesn't know how to decode calls for remote chains so it can't automatically populate `require_weight_at_most` required by V4 Transact.
     To fix this, XCM v5 Transact now also takes a `fallback_max_weight: Option<Weight>` parameter.
     This can be set to `None` if the instruction is not meant to be sent to chains running XCM versions lower than V5.
-    If set to `Some(w)`, a subsequent conversion to V4 will result in `Transact { require_weight_at_most: w, .. }`.
+    If set to `Some(weight)`, a subsequent conversion to V4 will result in `Transact { require_weight_at_most: weight, .. }`.
     The plan is to remove this workaround in V6 since there will be a good conversion path from V6 to V5.
 crates:
 - name: snowbridge-router-primitives