Add period to end of sentence.

README.md

@@ -14,7 +14,7 @@ Discussions: https://groups.google.com/forum/#!forum/gocql
 Production Stability
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 The underlying framing code was rewritten as part of #339 and as such may have
-unforseen bugs. If you run into a bug related to wire framing, please raise a ticket and we will try to resolve this as soon as we can. If you require a stable version to pin your production app against, we have tagged the previous stable version in source code, so you can build against this. The tag is called 1st_gen_framing (180456fef0a3c6d02c51dc7211f49b55e9315867). This note will be removed as the new generation framing code base matures
+unforseen bugs. If you run into a bug related to wire framing, please raise a ticket and we will try to resolve this as soon as we can. If you require a stable version to pin your production app against, we have tagged the previous stable version in source code, so you can build against this. The tag is called 1st_gen_framing (180456fef0a3c6d02c51dc7211f49b55e9315867). This note will be removed as the new generation framing code base matures.
 
 Supported Versions
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