Update 4.6 & 3.3 PHP requirements (#3234)

* update_from_4.6.md: about PHP 8.1 EOL
* requirements.md: about PHP 8.1 EOL
* requirements.md: about SF SA


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Co-authored-by: Tomasz Dąbrowski <64841871+dabrt@users.noreply.github.com>

Author: adriendupuis

docs/getting_started/requirements.md

@@ -136,17 +136,17 @@ For production setups it's recommended that you use Varnish/Fastly, Redis/Valkey
     - 8.3
     - 8.2
     - 8.1 (PHP 8.1 has reached its End of Life. Unless you have extended support from vendors like Debian or Zend, you should use PHP 8.2)
-    - 8.0 (PHP 8.0 has reached its End of Life. Unless you have extended support from vendors like Debian or Zend, you should use PHP 8.2)
-    - 7.4 (PHP 7.4 has reached its End of Life. Unless you have extended support from vendors like Debian or Zend, you should use PHP 8.2)
+    - 8.0 (PHP 8.0 has reached its End of Life. Security fixes for several Symfony dependencies are not available. Unless you have extended support from vendors like Debian or Zend, you should use PHP 8.2)
+    - 7.4 (PHP 7.4 has reached its End of Life. Security fixes for several Symfony dependencies are not available. Unless you have extended support from vendors like Debian or Zend, you should use PHP 8.2)
 
 === "[[= product_name =]] v3.3"
 
     - 8.3
     - 8.2
-    - 8.1
-    - 8.0 (PHP 8.0 has reached its End of Life. Unless you have extended support from vendors like Debian or Zend, you should use PHP 8.1)
-    - 7.4 (PHP 7.4 has reached its End of Life. Unless you have extended support from vendors like Debian or Zend, you should use PHP 8.1)
-    - 7.3 (PHP 7.3 has reached its End of Life. Unless you have extended support from vendors like Debian or Zend, you should use PHP 8.1)
+    - 8.1 (PHP 8.1 has reached its End of Life. Unless you have extended support from vendors like Debian or Zend, you should use PHP 8.2)
+    - 8.0 (PHP 8.0 has reached its End of Life. Unless you have extended support from vendors like Debian or Zend, you should use PHP 8.2)
+    - 7.4 (PHP 7.4 has reached its End of Life. Unless you have extended support from vendors like Debian or Zend, you should use PHP 8.2)
+    - 7.3 (PHP 7.3 has reached its End of Life. Unless you have extended support from vendors like Debian or Zend, you should use PHP 8.2)
 
 ### PHP extensions
 

docs/update_and_migration/from_4.6/update_from_4.6.md

@@ -698,7 +698,7 @@ If you're using PHP 7.4 or 8.0, to do the [[= product_name =]] update, you have
 
 #### Update PHP, the custom code, then the platform (recommended)
 
-Make sure to use on PHP 8.1 or higher.
+Make sure to use PHP 8.1 or higher. Since PHP 8.1 has reached its End of Life (EOL), it's recommended that you use PHP 8.2 or higher.
 Migrate custom code to be compatible with PHP 8.1 or higher, for example by using [Rector](https://github.com/rectorphp/rector).
 Then, update Ibexa DXP.