fix link

Author: Andy Barrett

reference-guides/overview.qmd

@@ -8,7 +8,7 @@ author: Andy P. Barrett
 This section of the cookbook contains **Reference Guides** to a
 variety of topics.  Reference Guides are intended to provide
 background information for the [**How-To
-Guides**](nsidc-data-cookbook/how-tos/overview.qmd) and [**Tutorials**](nsidc-data-cookbook/tutorials/index.qmd).
+Guides**](../how-to-guides/overview.qmd).
 
 Reference Guides are organized into the following sections:
 _Maybe add a short description of each section here_