Add docs from gofiber/template@264008d

Author: github-actions[bot]

docs/template/django/README.md

@@ -181,3 +181,9 @@ Hello, World!<br /><br />Greetings from Fiber Team
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+### Important Information on Template Data Binding
+
+When working with Pongo2 and this template engine, it's crucial to understand the specific rules for data binding. Only keys that match the following regular expression are supported: `^[a-zA-Z0-9_]+$`.
+
+This means that keys with special characters or punctuation, such as `my-key` or `my.key`, are not compatible and will not be bound to the template. This is a restriction imposed by the underlying Pongo2 template engine. Please ensure your keys adhere to these rules to avoid any binding issues.