Update app.py

app.py

@@ -54,7 +54,7 @@ PLAIN_FONT = "Arial, sans-serif"
 # ===== Axis Titles (easy to edit) ===========================================
 # Track plots: set either to a string to override, or leave as None to use defaults.
 X_AXIS_TITLE_OVERRIDE = "Breakout Limit (pcf)"          # e.g., "Mud Weight (pcf)"
-Y_AXIS_TITLE_OVERRIDE = Depth (ft)          # e.g., "Depth (ft)"
+Y_AXIS_TITLE_OVERRIDE = "Depth (ft)"         # e.g., "Depth (ft)"
 
 # Cross-plot axis titles. You can use {units} and it will fill from meta.
 CROSS_TITLES = {