Update packages.qmd

packages.qmd

@@ -544,7 +544,7 @@ Then come the `@importFrom` statements. This is where you list dependencies:
 This is important, because the statements will write the dependencies into the
 package’s `NAMESPACE` file. This file is important, because any function defined
 there will be available to your package’s functions when you load the package.
-So if your function use `dplyr::mutate()` for example, your package needs to
+So if your function uses `dplyr::mutate()` for example, your package needs to
 know where to look for `mutate()`. This is where the `NAMESPACE` file comes into
 play. Take the opportunity to list the dependencies of your function to review
 them: maybe you're using a package for a single dependency that you could easily