ARROW-14600: [Docs] Fix broken link in Python Development page
ARROW-14600: [Docs] Fix broken link in Python Development page

Fix a simple sphinx grammatical error of external web pages link here:
https://arrow.apache.org/docs/developers/python.html#build-and-test

Closes #11620 from daipom/fix-broken-link

Authored-by: daipom <586be9d9086b85247e91e469fa9d0dc97a060d58@clear-code.com>
Signed-off-by: Joris Van den Bossche <36c737f86d71d8ee1ddeb1e5c83102ee5de8f97c@gmail.com>

laurentgo/arrow,icexelloss/arrow,apache/arrow,wesm/arrow,laurentgo/arrow,apache/arrow,wesm/arrow,apache/arrow,kou/arrow,apache/arrow,apache/arrow,icexelloss/arrow,wesm/arrow,kou/arrow,kou/arrow,laurentgo/arrow,icexelloss/arrow,kou/arrow,kou/arrow,wesm/arrow,wesm/arrow,laurentgo/arrow,laurentgo/arrow,apache/arrow,wesm/arrow,wesm/arrow,kou/arrow,apache/arrow,apache/arrow,kou/arrow,laurentgo/arrow,apache/arrow,apache/arrow,laurentgo/arrow,laurentgo/arrow,laurentgo/arrow,apache/arrow,kou/arrow,icexelloss/arrow,icexelloss/arrow,icexelloss/arrow,icexelloss/arrow,laurentgo/arrow,kou/arrow,apache/arrow,laurentgo/arrow,kou/arrow,laurentgo/arrow,apache/arrow,icexelloss/arrow,icexelloss/arrow,wesm/arrow,kou/arrow,wesm/arrow,wesm/arrow,kou/arrow,icexelloss/arrow,wesm/arrow,kou/arrow,kou/arrow,icexelloss/arrow,wesm/arrow,wesm/arrow,icexelloss/arrow,icexelloss/arrow,laurentgo/arrow,laurentgo/arrow,wesm/arrow,apache/arrow,icexelloss/arrow,laurentgo/arrow