Correct a couple of unbalanced parenthesis. (GH-10779)

diff --git a/Doc/library/sysconfig.rst b/Doc/library/sysconfig.rst
index 9f549fb..b5a1da8 100644
--- a/Doc/library/sysconfig.rst
+++ b/Doc/library/sysconfig.rst
@@ -185,7 +185,7 @@
 
    Windows will return one of:
 
-   - win-amd64 (64bit Windows on AMD64 (aka x86_64, Intel64, EM64T, etc)
+   - win-amd64 (64bit Windows on AMD64, aka x86_64, Intel64, and EM64T)
    - win32 (all others - specifically, sys.platform is returned)
 
    Mac OS X can return: