Fix grammar.

Reported by Anatoly Techtonik on docs@
diff --git a/Doc/library/ctypes.rst b/Doc/library/ctypes.rst
index adb9595..99a2c4d 100644
--- a/Doc/library/ctypes.rst
+++ b/Doc/library/ctypes.rst
@@ -1348,7 +1348,7 @@
 Loading shared libraries
 ^^^^^^^^^^^^^^^^^^^^^^^^
 
-There are several ways to loaded shared libraries into the Python process.  One
+There are several ways to load shared libraries into the Python process.  One
 way is to instantiate one of the following classes: