fix: update pixi lock

Author: dmadisetti

index.qmd

@@ -48,7 +48,7 @@ Write a `qmd` document with `{marimo}` cells.
 For instance the following cell
 
 ````python
-```python {{.marimo}}
+```python {.marimo}
 print("remember that stdout is not shown")
 result = "Only outputs!"
 result,
@@ -68,7 +68,7 @@ result,
 We can make it editable:
 
 ````python
-```python {{.marimo}}
+```python {.marimo}
 #| editor: true
 editor_result = "Change me" + ("!" * 3)
 editor_result,