Update php-qrcode and php-settings-container for PHP 8.1

By running the following command after updating composer.json

```
composer update chillerlan/php-qrcode chillerlan/php-settings-container
```

This change fixes a deprecation warning from Preferences ->
Personal data / Authentication -> Authenticator (OTP).

```
Return type of chillerlan\Settings\SettingsContainerAbstract::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice
1. vendor/chillerlan/php-settings-container/src/SettingsContainerAbstract.php(19): ttrss_error_handler(Return type of chillerlan\Settings\SettingsContainerAbstract::jsonSerialize() should either be compatible with JsonSerializable::jsonSerialize(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice, vendor/chillerlan/php-settings-container/src/SettingsContainerAbstract.php)
2. vendor/composer/ClassLoader.php(571): include(/usr/share/webapps/tt-rss/vendor/chillerlan/php-settings-container/src/SettingsContainerAbstract.php)
3. vendor/composer/ClassLoader.php(428): Composer\Autoload\includeFile(/usr/share/webapps/tt-rss/vendor/composer/../chillerlan/php-settings-container/src/SettingsContainerAbstract.php)
4. vendor/chillerlan/php-qrcode/src/QROptions.php(59): loadClass(chillerlan\Settings\SettingsContainerAbstract)
5. vendor/composer/ClassLoader.php(571): include(/usr/share/webapps/tt-rss/vendor/chillerlan/php-qrcode/src/QROptions.php)
6. vendor/composer/ClassLoader.php(428): Composer\Autoload\includeFile(/usr/share/webapps/tt-rss/vendor/composer/../chillerlan/php-qrcode/src/QROptions.php)
7. vendor/chillerlan/php-qrcode/src/QRCode.php(113): loadClass(chillerlan\QRCode\QROptions)
8. classes/pref/prefs.php(958): __construct()
9. classes/pref/prefs.php(469): _get_otp_qrcode_img()
10. classes/pref/prefs.php(541): index_auth_2fa()
11. backend.php(136): index_auth()
```

The issue is fixed in php-settings-container 2.1.1 [1] Here I use the
latest php-qrcode version for another PHP 8.1 fix [2].

[1] https://github.com/chillerlan/php-settings-container/commit/68bc5019c8b38956c83906431ef879668366b036#diff-359c7f7a6d32d9935951e1b0742eb116fb654f4a932c8d40328bb5dcab2fa111L162
[2] https://github.com/chillerlan/php-qrcode/issues/97

1 files changed, 13 insertions, 0 deletions

diff --git a/vendor/chillerlan/php-settings-container/docs/Readme.md b/vendor/chillerlan/php-settings-container/docs/Readme.md
new file mode 100644
index 000000000..7749a1e7f
--- /dev/null
+++ b/vendor/chillerlan/php-settings-container/docs/Readme.md
@@ -0,0 +1,13 @@
+# Auto generated API documentation
+
+The API documentation can be auto generated with [phpDocumentor](https://www.phpdoc.org/). 
+There is an [online version available](https://chillerlan.github.io/php-settings-container/) via the [gh-pages branch](https://github.com/chillerlan/php-settings-container/tree/gh-pages) that is [automatically deployed](https://github.com/chillerlan/php-settings-container/deployments) on each push to main.
+
+Locally created docs will appear in this directory. If you'd like to create local docs, please follow these steps:
+
+- [download phpDocumentor](https://github.com/phpDocumentor/phpDocumentor/releases) v3+ as .phar archive
+- run it in the repository root directory:
+  - on Windows `c:\path\to\php.exe c:\path\to\phpDocumentor.phar --config=phpdoc.xml`
+  - on Linux just `php /path/to/phpDocumentor.phar --config=phpdoc.xml`
+- open [index.html](./index.html) in a browser
+- profit!