docs: Update repository references in CONTRIBUTING.md

Author: mcdax

CONTRIBUTING.md

@@ -29,8 +29,8 @@ Enhancement suggestions are welcome! When proposing a feature:
 1. **Fork the repository** on GitHub
 2. **Clone your fork**:
    ```bash
-   git clone https://github.com/yourusername/comdirect-client.git
-   cd comdirect-client
+    git clone https://github.com/mcdax/comdirect-python-library.git
+    cd comdirect-python-library
    ```
 
 3. **Create a virtual environment**: