Update CustomConfig.md

refined texts

doc/CustomConfig.md

@@ -21,7 +21,7 @@ The `Config` class has the following options:
 |--------------------------|---------|-----------------|------------------------------------------------------------------------------------------------------------------------------------------------------|
 | `setDecodeMemoryLimit`   | Integer | `0`             | If parsing fails because of memory exhaustion, you can set a lower memory limit for decoding operations.                                             |
 | `setFontSpaceLimit`      | Integer | `-50`           | Changing font space limit can be helpful when `Parser::getText()` returns a text with too many spaces.                                               |
-| `setIgnoreEncryption`    | Boolean | `false`         | Read PDFs that are not encrypted but have the encryption flag set.                                                                                   |
+| `setIgnoreEncryption`    | Boolean | `false`         | Read PDFs that are not encrypted but have the encryption flag set. This is a temporary workaround, don't rely on it.                                 |
 | `setHorizontalOffset`    | String  | ` `             | When words are broken up or when the structure of a table is not preserved, you may get better results when adapting `setHorizontalOffset`.          |
 | `setPdfWhitespaces`      | String  | `\0\t\n\f\r `   |                                                                                                                                                      |
 | `setPdfWhitespacesRegex` | String  | `[\0\t\n\f\r ]` |                                                                                                                                                      |
@@ -69,7 +69,7 @@ $pdf = $parser->parseFile('document.pdf');
 
 In some cases PDF files may be internally marked as encrypted even though the content is not encrypted and can be read.
 This can be caused by the PDF being created by a tool that does not properly set the encryption flag.
-If you are sure that the PDF is not encrypted, you can ignore the encryption flag by setting the `ignoreEncryption` flag to `true` in the `Config` object.
+If you are sure that the PDF is not encrypted, you can ignore the encryption flag by setting the `ignoreEncryption` flag to `true` in a custom `Config` instance.
 
 ```php
 $config = new \Smalot\PdfParser\Config();