Deprectate Python 3.8

Author: wilsenhc

README.md

@@ -26,7 +26,6 @@ You can write functions in any of the following runtimes and execute them straig
 - Python 3.11
 - Python 3.10
 - Python 3.9
-- Python 3.8
 - Java 21
 - Java 17
 - Java 11

docs/functions/customization.md

@@ -13,7 +13,6 @@ Lambda supports multiple languages through the use of runtimes. You can choose a
 - Python 3.11: `python3.11`
 - Python 3.10: `python3.10`
 - Python 3.9: `python3.9`
-- Python 3.8: `python3.8`
 - Java 21: `java21`
 - Java 17: `java17`
 - Java 11: `java11`

src/Runtime.php

@@ -22,6 +22,7 @@ abstract class Runtime
 
     public const PYTHON_39 = 'python3.9';
 
+    /** @deprecated */
     public const PYTHON_38 = 'python3.8';
 
     /** @deprecated */