Fix crash when rotating (#3957)

Task/Issue URL:
https://app.asana.com/0/414709148257752/1209376796676971/f
Tech Design URL:
CC:

**Description**:
Fixes crash introduced on #3881
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Recreated from [already accepted
PR](#3956).

**Steps to test this PR**:
1.Test rotation to / from landscape with and without the keyboard.
Confirm that the UI updates as expected and that the keyboard remains
visible if it was visible before rotation.
2.Validate iPad behaviour remains the same.


**Definition of Done (Internal Only)**:

* [x] Does this PR satisfy our [Definition of
Done](https://app.asana.com/0/1202500774821704/1207634633537039/f)?

Co-authored-by: Fernando Bunn <[email protected]>

Author: dus7

DuckDuckGo/SwipeTabsCoordinator.swift

@@ -111,8 +111,7 @@ class SwipeTabsCoordinator: NSObject {
         updateLayout()
         scrollToCurrent()
 
-        let indexPath = IndexPath(row: self.tabsModel.currentIndex, section: 0)
-        collectionView.reloadItems(at: [indexPath])
+        collectionView.reloadData()
     }
 
     private func updateLayout() {