fix doc links

Author: adriangb

datafusion/physical-plan/src/filter_pushdown.rs

@@ -216,6 +216,8 @@ impl FilterDescription {
     /// field direclty.
     /// For example, nodes like [`RepartitionExec`] that let filters pass through it transparently
     /// use this to mark all parent filters as supported.
+    /// 
+    /// [`RepartitionExec`]: crate::repartition::RepartitionExec
     pub fn all_parent_filters_supported(
         self,
         parent_filters: Vec<Arc<dyn PhysicalExpr>>,
@@ -235,6 +237,8 @@ impl FilterDescription {
     /// field direclty.
     /// For example, the default implementation of filter pushdwon in [`ExecutionPlan`]
     /// assumes that filters cannot be pushed down to children.
+    /// 
+    /// [`ExecutionPlan`]: crate::ExecutionPlan
     pub fn all_parent_filters_unsupported(
         self,
         parent_filters: Vec<Arc<dyn PhysicalExpr>>,