Escaping double quotes inside the JSON quoted string

Test: treehugger
Change-Id: I56459298416d827699e18204a990937c92b0109e
diff --git a/METADATA b/METADATA
index ca6f3d5..1cad3d7 100644
--- a/METADATA
+++ b/METADATA
@@ -2,7 +2,7 @@
 description:
     "cryptography is a package which provides cryptographic recipes and "
     "primitives to Python developers. Our goal is for it to be your "
-    ""cryptographic standard library". It supports Python 2.7, Python 3.6+, and "
+    "\"cryptographic standard library\". It supports Python 2.7, Python 3.6+, and "
     "PyPy 5.4+."
 
 third_party {