message: Update Pre-installed PHP in README
diff: @@ -66,12 +66,12 @@ Both `GitHub-hosted` and `self-hosted` runners are suppported by `setup-php` on
  |Virtual environment|YAML workflow label|Pre-installed PHP|
  |--- |--- |--- |
  -|Ubuntu 16.04|`ubuntu-16.04`|`PHP 5.6` to `PHP 7.4`|
  -|Ubuntu 18.04|`ubuntu-latest` or `ubuntu-18.04`|`PHP 7.1` to `PHP 7.4`|
  -|Ubuntu 20.04|`ubuntu-20.04`|`PHP 7.4`|
  -|Windows Server 2019|`windows-latest` or `windows-2019`|`PHP 7.4`|
  -|macOS Catalina 10.15|`macos-latest` or `macos-10.15`|`PHP 7.4`|
  -|macOS Big Sur 11.0|`macos-11.0`|`PHP 7.4`|
  +|Ubuntu 16.04|`ubuntu-16.04`|`PHP 5.6` to `PHP 8.0`|
  +|Ubuntu 18.04|`ubuntu-latest` or `ubuntu-18.04`|`PHP 7.1` to `PHP 8.0`|
  +|Ubuntu 20.04|`ubuntu-20.04`|`PHP 7.4` to `PHP 8.0`|
  +|Windows Server 2019|`windows-latest` or `windows-2019`|`PHP 8.0`|
  +|macOS Catalina 10.15|`macos-latest` or `macos-10.15`|`PHP 8.0`|
  +|macOS Big Sur 11.0|`macos-11.0`|`PHP 8.0`|
  ### Self-Hosted Runners
  