Fix a typo in SECURITY.md (GH-13568)

pgagnon · miss-islington · commit a8e814db96eb · 2019-05-27T10:45:24.000-07:00
There is a duplicated "in" in the Supported Versions text.
diff --git a/.github/SECURITY.md b/.github/SECURITY.md
@@ -2,7 +2,7 @@
 
 ## Supported Versions
 
-The Python team applies security fixes according to the table in
+The Python team applies security fixes according to the table
 in [the devguide](
 https://devguide.python.org/#status-of-python-branches
 ).
