Update examples/forward-proxy/README.md

Co-authored-by: Thomas Maas <thomas@webtypes.com>

Author: eguzki

examples/forward-proxy/README.md

@@ -1,6 +1,6 @@
 # PROXY with upstream using TLSv1.3
 
-APIcast --> tiny proxy (connect to 443 but not cert installed) --> upstream (TLSv1.3)
+APIcast --> tiny proxy (connect to 443 but no cert installed) --> upstream (TLSv1.3)
 
 APicast starts SSL tunnel (via HTTP Connect method) against proxy to access upstream configured with TLSv1.3