add upgrade instructions to documentation

Author: ceciliastevens

docs/cli/index.md

@@ -13,6 +13,12 @@ Install the CLI extension to the Incydr SDK with pip.  Use the following command
 $ pip install 'incydr[cli]'
 ```
 
+To upgrade an existing installation, use the `--upgrade` flag:
+
+```bash
+$ pip install 'incydr[cli]' --upgrade
+```
+
 See [Getting Started](getting_started.md) for more further details on setting up your Incydr CLI.
 
 ## Commands

docs/sdk/index.md

@@ -15,6 +15,13 @@ Install using pip:
 $ pip install incydr
 ```
 
+To upgrade an existing installation, use the `--upgrade` flag:
+
+```bash
+$ pip install incydr --upgrade
+```
+
+
 Import the `incydr.Client` initialize with your Incydr API Client:
 
 ```python