fix: replace .english.md extension with .md

curriculum/challenges/english/08-data-analysis-with-python/numpy/copying-arrays-warning.md

@@ -0,0 +1,46 @@
+---
+id: 5e9a0a8e09c5df3cc3600ed7
+title: Copying Arrays Warning
+challengeType: 11
+videoId: iIoQ0_L0GvA
+---
+
+## Description
+
+<section id='description'>
+</section>
+
+## Tests
+
+<section id='tests'>
+
+````yml
+question:
+  text: |
+    What is the value of `a` after running the following code?
+
+    ```py
+    import numpy as np
+
+    a = np.array([1, 2, 3, 4, 5])
+    b = a
+    b[2] = 20
+    ```
+
+  answers:
+    - |
+      ```python
+      [1 2 3 4 5]
+      ```
+    - |
+      ```python
+      [1 2 20 4 5]
+      ```
+    - |
+      ```python
+      [1 20 3 4 5]
+      ```
+  solution: 2
+````
+
+</section>