Fix markdown typo introduced in Automattic#14230

Author: monkbroc

docs/compatibility.md

@@ -20,7 +20,7 @@ Below are the [semver](http://semver.org/) ranges representing which versions of
 | :------------: | :-------------------------------------: |
 |     `7.x`      |            `^7.4.0 \| ^8.0.0`           |
 |     `6.x`      |      `^6.5.0 \| ^7.0.0 \| ^8.0.0`       |
-|     `5.x`      | `^5.13.0` | `^6.0.0 \| ^7.0.0 \| ^8.0.0`|
+|     `5.x`      | `^5.13.0` \| `^6.0.0 \| ^7.0.0 \| ^8.0.0`|
 |    `4.4.x`     | `^5.10.0 \| ^6.0.0 \| ^7.0.0 \| ^8.0.0` |
 |    `4.2.x`     | `^5.7.0 \| ^6.0.0 \| ^7.0.0 \| ^8.0.0`  |
 |    `4.0.x`     | `^5.2.0 \| ^6.0.0 \| ^7.0.0 \| ^8.0.0`  |