fix: update altair notebooks

- Update altair/02_marks_encoding.py
- Update altair/05_view_composition.py

Co-authored-by: Srihari Thyagarajan <57552973+Haleshot@users.noreply.github.com>

altair/02_marks_encoding.py

@@ -566,7 +566,7 @@ def _(mo):
 
     The `column` and `row` encoding channels generate either a horizontal (columns) or vertical (rows) set of sub-plots, in which the data is partitioned according to the provided data field.
 
-    Here is a trellis plot that divides the data into one column per \`cluster\` value:
+    Here is a trellis plot that divides the data into one column per `cluster` value:
     """)
     return
 

altair/05_view_composition.py

@@ -712,7 +712,7 @@ def _(mo):
     return
 
 
-@app.cell
+@app.cell(hide_code=True)
 def _(alt, weather):
     splom = alt.Chart().mark_point(filled=True, size=15, opacity=0.5).encode(
       alt.X(alt.repeat('column'), type='quantitative'),