Update minimum supported Python version to 3.9 (open-telemetry#7253)

Co-authored-by: Tiffany Hrabusa <[email protected]>

Author: tammy-baylis-swi

content/en/docs/languages/python/_index.md

@@ -11,7 +11,7 @@ weight: 22
 
 ## Version support
 
-OpenTelemetry-Python supports Python 3.8 and higher.
+OpenTelemetry-Python supports Python 3.9 and higher.
 
 ## Installation
 

content/en/docs/platforms/faas/lambda-auto-instrument.md

@@ -76,8 +76,8 @@ about supported JavaScript and Node.js versions, see the
 
 {{% /tab %}} {{% tab Python %}}
 
-The Lambda layer supports Python 3.8 and Python 3.9 Lambda runtimes. For more
-information about supported Python versions, see the
+The Lambda layer supports Python 3.9+ Lambda runtimes. For more information
+about supported Python versions, see the
 [OpenTelemetry Python documentation](https://github.com/open-telemetry/opentelemetry-python/blob/main/README.md#supported-runtimes)
 and the package on [PyPi](https://pypi.org/project/opentelemetry-api/).