Update README.md

Author: Jayclifford345

README.md

@@ -42,6 +42,14 @@ pip install influxdb3-python
 
 Note: This does not include Pandas support. If you would like to use key features such as `to_pandas()`  and `write_file()` you will need to install `pandas` separately.
 
+```bash
+pip install influxdb3-python[pandas]
+```
+or
+```bash
+pip install pandas
+```
+
 *Note: Please make sure you are using 3.6 or above. For the best performance use 3.11+*
 
 # Usage