minor #18360 Upgrade the minimum PHP version requirement for Symfony 7.0 (javiereguiluz)

This PR was merged into the 7.0 branch.

Discussion
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Upgrade the minimum PHP version requirement for Symfony 7.0

Fixes #18340.

The first PR for Symfony 7 🥳

`@stof` could you please check if it's still true that you must have all the following PHP extensions to run any Symfony app: `Ctype`, `iconv`, `PCRE`, `Session`, `SimpleXML`, and `Tokenizer`.

Thanks!

Commits
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291cded Upgrade the minimum PHP version requirement for Symfony 7.0

Author: javiereguiluz

setup.rst

@@ -14,7 +14,7 @@ Technical Requirements
 
 Before creating your first Symfony application you must:
 
-* Install PHP 8.1 or higher and these PHP extensions (which are installed and
+* Install PHP 8.2 or higher and these PHP extensions (which are installed and
   enabled by default in most PHP 8 installations): `Ctype`_, `iconv`_,
   `PCRE`_, `Session`_, `SimpleXML`_, and `Tokenizer`_;
 * `Install Composer`_, which is used to install PHP packages.