Test importing matplotlib

Author: ElliottKasoar

.github/workflows/windows.yml

@@ -25,3 +25,6 @@ jobs:
 
       - name: Test importing tkinter
         run: uv run --no-sync python -c 'import tkinter as tk; tk.Tk()'
+
+      - name: Test importing matplotlib
+        run: uv run --no-sync python -c 'import matplotlib.pyplot as plt; plt.plot()'