Update README to Python-3.10 (#1231)

README.md

@@ -141,12 +141,12 @@ locally if you are planning to contribute to the project.
 * Using `pyenv` to manage virtualenv's is recommended but not necessary
 	* Mac install instructions. See [here](https://github.com/Unstructured-IO/community#mac--homebrew) for more detailed instructions.
 		* `brew install pyenv-virtualenv`
-	  * `pyenv install 3.8.17`
+	  * `pyenv install 3.10`
   * Linux instructions are available [here](https://github.com/Unstructured-IO/community#linux).
 
 * Create a virtualenv to work in and activate it, e.g. for one named `unstructured`:
 
-	`pyenv  virtualenv 3.8.17 unstructured` <br />
+	`pyenv  virtualenv 3.10 unstructured` <br />
 	`pyenv activate unstructured`
 
 * Run `make install`