update docs

Author: jhamman

docs/user-guide/installation.md

@@ -7,7 +7,8 @@ Required dependencies include:
 - [Python](https://docs.python.org/3/) (3.11 or later)
 - [packaging](https://packaging.pypa.io) (22.0 or later)
 - [numpy](https://numpy.org) (1.26 or later)
-- [numcodecs[crc32c]](https://numcodecs.readthedocs.io) (0.14 or later)
+- [numcodecs](https://numcodecs.readthedocs.io) (0.14 or later)
+- [google-crc32c](https://github.com/googleapis/python-crc32c) (1.5 or later)
 - [typing_extensions](https://typing-extensions.readthedocs.io) (4.9 or later)
 - [donfig](https://donfig.readthedocs.io) (0.8 or later)