Fixes configuration options retrieval on Pylint 3 (#63)

* Fixes configuration options retrieval on Pylint 3

> See <pylint-dev/pylint@2f7cb98>.

* Update CHANGELOG.md

Author: HorlogeSkynet

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+
+- Configuration options retrieval on Pylint 3
+
 ### Repository
 
 - Update `astral-sh/ruff-pre-commit` hook to v0.1.7

pylint_secure_coding_standard.py

@@ -723,7 +723,7 @@ def load_configuration(linter):  # pragma: no cover
     """Load data from the configuration file."""
     for checker in linter.get_checkers():
         if isinstance(checker, SecureCodingStandardChecker):
-            checker.set_os_open_allowed_modes(checker.config.os_open_mode)
-            checker.set_os_mkdir_allowed_modes(checker.config.os_mkdir_mode)
-            checker.set_os_mkfifo_allowed_modes(checker.config.os_mkfifo_mode)
-            checker.set_os_mknod_allowed_modes(checker.config.os_mknod_mode)
+            checker.set_os_open_allowed_modes(checker.linter.config.os_open_mode)
+            checker.set_os_mkdir_allowed_modes(checker.linter.config.os_mkdir_mode)
+            checker.set_os_mkfifo_allowed_modes(checker.linter.config.os_mkfifo_mode)
+            checker.set_os_mknod_allowed_modes(checker.linter.config.os_mknod_mode)