Update README.md

The unicode-segmentation library supports Unicode 15.1.0, according to its docs.

Author: cometkim

README.md

@@ -219,7 +219,7 @@ Since [Hermes doesn't support the `Intl.Segmenter` API](https://github.com/faceb
 | `graphemer`                  |   15.0.0 |   ✖️ ️|   410,435 |     95,104 |          15,752 |        10,660 |          15,911 |
 | `grapheme-splitter`          |   10.0.0 |   ✖️ |   122,254 |     23,682 |           7,852 |         4,802 |           6,753 |
 | `@formatjs/intl-segmenter`*  |   15.0.0 |   ✖️ |   603,510 |    369,673 |          72,273 |        49,530 |          68,027 |
-| `unicode-segmentation`*      |   16.0.0 |   ✔️ |    56,529 |     52,439 |          24,108 |        17,343 |          24,375 |
+| `unicode-segmentation`*      |   15.1.0 |   ✔️ |    56,529 |     52,439 |          24,108 |        17,343 |          24,375 |
 | `Intl.Segmenter`*            |        - |    - |         0 |          0 |               0 |             0 |               0 |
 
 * `@formatjs/intl-segmenter` handles grapheme, word, and sentence, but it's not tree-shakable.