minor symfony#21039 Bump PHP requirements to 8.4 in Symfony 8.0 (javiereguiluz)

This PR was merged into the 8.0 branch.

Discussion
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Bump PHP requirements to 8.4 in Symfony 8.0

Fixes symfony#21038.

Commits
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578f764 Bump PHP requirements to 8.4 in Symfony 8.0

Author: xabbuh

contributing/code/pull_requests.rst

@@ -31,7 +31,7 @@ Before working on Symfony, setup a friendly environment with the following
 software:
 
 * Git;
-* PHP version 8.2 or above.
+* PHP version 8.4 or above.
 
 Configure Git
 ~~~~~~~~~~~~~

setup.rst

@@ -14,7 +14,7 @@ Technical Requirements
 
 Before creating your first Symfony application you must:
 
-* Install PHP 8.2 or higher and these PHP extensions (which are installed and
+* Install PHP 8.4 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.