hotfix: update overview.mdx (#235)

# Motivation
<!-- Why is this change necessary? -->

# Content
<!-- Please include a summary of the change -->
# Testing
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# Please check the following before marking your PR as ready for review

- [ ] I have added tests for my changes
- [ ] I have updated the documentation or added new documentation as
needed

Author: jayhack

docs/introduction/overview.mdx

@@ -36,24 +36,19 @@ def baz():
   pass
 `
 
+<iframe
+  width="100%"
+  height="370px"
+  scrolling="no"
+  src={`https://codegen.sh/embedded/codemod/?code=${encodeURIComponent(
+    metaCode
+  )}&input=${encodeURIComponent(code)}`}
+  style={{
+    backgroundColor: "#15141b",
+  }}
+  className="rounded-xl"
+></iframe>
 
-```python
-from codegen import Codebase
-
-# Codegen builds a complete graph connecting
-# functions, classes, imports and their relationships
-codebase = Codebase("./")
-
-# Work with code without dealing with syntax trees or parsing
-for function in codebase.functions:
-    # Comprehensive static analysis for references, dependencies, etc.
-    if not function.usages:
-        # Auto-handles references and imports to maintain correctness
-        function.remove()
-
-# Fast, in-memory code index
-codebase.commit()
-```
 
 <Note>
 Codegen handles complex refactors while maintaining correctness, enabling a broad set of advanced code manipulation programs.