Fix typo (#12565)

Author: paulb777

Firestore/Source/Public/FirebaseFirestore/FIRSnapshotListenOptions.h

@@ -61,7 +61,7 @@ NS_SWIFT_NAME(SnapshotListenOptions)
 - (instancetype)init NS_DESIGNATED_INITIALIZER;
 
 /**
- * Creates and returns a new `SnapshotListenOptions` object with with all properties of the current
+ * Creates and returns a new `SnapshotListenOptions` object with all properties of the current
  * `SnapshotListenOptions` object plus the new property specifying whether metadata-only changes
  * should trigger snapshot events
  *
@@ -70,7 +70,7 @@ NS_SWIFT_NAME(SnapshotListenOptions)
 - (FIRSnapshotListenOptions *)optionsWithIncludeMetadataChanges:(BOOL)includeMetadataChanges;
 
 /**
- * Creates and returns a new `SnapshotListenOptions` object with with all properties of the current
+ * Creates and returns a new `SnapshotListenOptions` object with all properties of the current
  * `SnapshotListenOptions` object plus the new property specifying the source that the snapshot
  * listener listens to.
  *