Minor fixes to README

Author: duckontheweb

README.md

@@ -6,16 +6,17 @@
 [![Gitter](https://badges.gitter.im/SpatioTemporal-Asset-Catalog/python.svg)](https://gitter.im/SpatioTemporal-Asset-Catalog/python?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
 [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
 
-PySTAC is a library for working with [SpatialTemporal Asset Catalog](https://stacspec.org) in Python 3.
+PySTAC is a library for working with [SpatioTemporal Asset Catalog](https://stacspec.org) in Python 3.
 
 ## Installation
 
-PySTAC requires Python>=3.7. This project follows the recommendations of
+PySTAC requires Python >= 3.7. This project follows the recommendations of
 [NEP-29](https://numpy.org/neps/nep-0029-deprecation_policy.html) in deprecating support
 for Python versions. This means that users can expect support for Python 3.7 to be
-removed in next major or minor release after Dec 26, 2021.
+removed from the `main` branch after Dec 26, 2021 and therefore from the next release
+after that date.
 
-*Support for Python>=3.10 should be considered experimental
+*Support for Python >= 3.10 should be considered experimental
 until further notice.*
 
 PySTAC has a single required dependency (`python-dateutil`).