Fix README.md [skip ci]

Author: shivammathur

README.md

@@ -6,7 +6,9 @@
 
 > Scripts to install end of life PHP versions.
 
-PHP versions in this project have reached end of life and should not be used except for testing backward-compatibility. This project aims to provide old PHP for GitHub Actions Ubuntu runners. You might need some more libraries if using this elsewhere.
+PHP versions in this project have reached end of life, so only use this project in isolated environments like a container, also only for testing backward-compatibility. Do not use this in production.
+
+The aim is to provide old PHP for GitHub Actions Ubuntu runners. You might need some more libraries if using this elsewhere.
 
 ## Usage
 
@@ -28,17 +30,13 @@ curl -sSL https://github.com/shivammathur/php5-ubuntu/releases/latest/download/i
 ## License
 
 - The code and documentation in this project is licensed under the [MIT license](LICENSE "License for shivammathur/php5-ubuntu").
-- The PHP packages except for PHP 5.3 have been sourced from [Dotdeb Releases](https://www.dotdeb.org/ "Dotdeb PHP releases").
 - The library binaries have been sourced from [Ubuntu](https://packages.ubuntu.com/ "Ubuntu Packages Repository") package archive.
 - This project has multiple [dependencies](#dependencies "Dependencies of shivammathur/php5-ubuntu"). Their licenses can be found in their respective repositories.
 
 ## Dependencies
 
-- [PHP 5.3 libraries](https://github.com/shivammathur/php5-ubuntu/tree/main/php-5.3/deps "Libraries for PHP 5.3")
-- [PHP 5.4 libraries](https://github.com/shivammathur/php5-ubuntu/tree/main/php-5.4/deps "Libraries for PHP 5.4")
-- [PHP 5.5 libraries](https://github.com/shivammathur/php5-ubuntu/tree/main/php-5.5/deps "Libraries for PHP 5.5")
+- [Libraries](https://github.com/shivammathur/php5-ubuntu/tree/main/deps "Libraries for old PHP")
 - [APCu](https://github.com/krakjoe/apcu "APCu PHP extension")
-- [Dotdeb](https://www.dotdeb.org/ "Dotdeb PHP releases")
 - [Imagick](https://github.com/Imagick/imagick "Imagick PHP extension")
 - [PEAR](https://github.com/pear/pear-core "PEAR to install extensions")
 - [PHP](https://github.com/php/php-src "PHP upstream")