docs: update descriptors page

Author: GregTonoski

docs/descriptors/README.md

@@ -32,14 +32,15 @@ Below are some tables to highlight the differences between Bitcoin Core's descri
 | `pk()` | ✓ | ✓ | ✓ |
 | `pkh()` | ✓ | ✓ | ✓ |
 | `wpkh()` | ✓ | ✓ | ✓ |
+| `tr()` | ✓ | ✓ | ✓ |
 | `sh(wpkh())` | ✓ | ✓ | ✓ |
 | `sh()` | ✓ | ✓ | ✓ |
 | `wsh()` | ✓ | ✓ | ✓ |
 | `sh(wsh())` | ✓ | ✓ | ✓ |
 | `combo()` | ✗  | ✗  | ✓ |
 | `addr()` | ✗  | ✗  | ✓ |
 | `raw()` | ✗  | ✗  | ✓ |
-| Bare scripts | ✓ | ✓ | ✗  |
+| Bare scripts | ✓ | ✓ | ✗ |
 
 </div>