fix typo

Author: lorenzwalthert

.pre-commit-config.yaml

@@ -8,7 +8,7 @@ repos:
     rev: v0.1.3.9135
     hooks: 
     -   id: style-files
-        args: [--style_pkg=styler, --style_fun=tidyverse_style, --cache_root=styler-perm]
+        args: [--style_pkg=styler, --style_fun=tidyverse_style, --cache-root=styler-perm]
         exclude: > 
           (?x)^(
           tests/testthat/in/.*\.R|

vignettes/available-hooks.Rmd

@@ -92,7 +92,7 @@ In addition, the hook takes the following arguments that are not passed to
 ```
 
 
-* Argument `cache_root` is passed to `options()` to set `styler.cache_root`.
+* Argument `cache-root` is passed to `options()` to set `styler.cache_root`.
   Default value: `styler-perm`. The argument 
   determines the sub-directory under the {R.cache} cache directory that {styler}
   uses. If you want {styler} to auto-clean up caches older than 6 days, set this