docs: fixed unresolved tutorial link

README.md

@@ -32,4 +32,4 @@ All of `opticam_new`'s dependencies are available as Python packages via your pr
 
 ## Getting Started
 
-Documentation for `opticam_new` is available on [Read the Docs](https://opticam-new.readthedocs.io/en/latest/index.html). To get started, I recommend checking out the [basic usage](https://opticam-new.readthedocs.io/en/latest/tutorials/basic_usage.html) tutorial.
+Documentation for `opticam_new` is available on [Read the Docs](https://opticam-new.readthedocs.io/en/latest/index.html). To get started, I recommend checking out the [basic usage](https://opticam-new.readthedocs.io/en/latest/tutorials/reduction.html) tutorial.

docs/index.rst

@@ -7,7 +7,7 @@ A Python package for reducing OPTICAM data.
    :maxdepth: 3
    :caption: Contents:
 
-   tutorials/basic_usage
+   tutorials/reduction
    tutorials/applying_corrections
    tutorials/backgrounds
    tutorials/local_backgrounds