Fix capitalization

Author: tkoyama010

content/en/contribute.md

@@ -95,12 +95,12 @@ of this effort.  See
 for background; comment on [this GitHub
 issue](https://github.com/numpy/numpy.org/issues/55) to sign up.
 
-The recommended way for new contributors to translate NumPy's documentation is to join the translation team on Crowdin.
+The recommended way for new contributors to translate NumPy's documentation is to join the translation team on crowdin.
 There is a NumPy's translation page for NumPy (main) documentation.
 
-1. Login to [Crowdin](https://crowdin.com/) service.
+1. Login to [crowdin](https://crowdin.com/) service.
 1. Go to [NumPy.Org project page](https://crowdin.com/project/numpyorg).
-1. Translate on Crowdin.
+1. Translate on crowdin.
 
 We can host the translated document in numpy.org after translation is completed.
 Translation is backed up in [numpy.org GitHub repository](https://github.com/numpy/numpy.org).