Fix readme typo (#3079)

Author: pvinis

README.md

@@ -2140,7 +2140,7 @@ change their behavior.
 | `[default]`<sup>1.43.0</sup> | recipe | Use recipe as module's default recipe. |
 | `[doc(DOC)]`<sup>1.27.0</sup> | module, recipe | Set recipe or module's [documentation comment](#documentation-comments) to `DOC`. |
 | `[extension(EXT)]`<sup>1.32.0</sup> | recipe | Set shebang recipe script's file extension to `EXT`. `EXT` should include a period if one is desired. |
-| `[group(NAME)]`<sup>1.27.0</sup> | module, recipe | Put recipe or module in in [group](#groups) `NAME`. |
+| `[group(NAME)]`<sup>1.27.0</sup> | module, recipe | Put recipe or module in [group](#groups) `NAME`. |
 | `[linux]`<sup>1.8.0</sup> | recipe | Enable recipe on Linux. |
 | `[macos]`<sup>1.8.0</sup> | recipe | Enable recipe on MacOS. |
 | `[metadata(METADATA)]`<sup>1.42.0</sup> | recipe | Attach `METADATA` to recipe. |