🐛 Bug Report: Cannot update documents created with a null field whose attribute name contains a period

### 👟 Reproduction steps In the Appwrite Console: - Create a new collection - Add a nullable attribute with the name containing a period - Create a document in the collection with a null value for the above attribute - Try to update the document data after its creation ### 👍 Expected behavior The document data should update. ### 👎 Actual Behavior Throws an error: "Invalid document structure: Unknown attribute"  ### 🎲 Appwrite version Version 1.5.x ### 💻 Operating system Linux ### 🧱 Your Environment Appwrite 1.5.4 Docker 24.0.2 Ubuntu 22.04.2 LTS ### 👀 Have you spent some time to check if this issue has been raised before? - [X] I checked and didn't find similar issue ### 🏢 Have you read the Code of Conduct? - [X] I have read the [Code of Conduct](https://github.com/appwrite/.github/blob/main/CODE_OF_CONDUCT.md)