Use correct script type in rustdoc

Author: tcharding

src/descriptor/tr/taptree.rs

@@ -188,7 +188,7 @@ pub struct TapTreeIterItem<'tr, Pk: MiniscriptKey> {
 impl<'tr, Pk: MiniscriptKey> TapTreeIterItem<'tr, Pk> {
     /// The Tapscript in the leaf.
     ///
-    /// To obtain a [`bitcoin::Script`] from this node, call [`Miniscript::encode`]
+    /// To obtain a [`bitcoin::script::ScriptBuf`] from this node, call [`Miniscript::encode`]
     /// on the returned value.
     #[inline]
     pub fn miniscript(&self) -> &'tr Arc<Miniscript<Pk, Tap>> { self.node }