Add reminder for version update

Daniel Lockyer · web-flow · commit ba862501a71b · 2017-04-12T06:30:39.000+01:00
diff --git a/Cargo.toml b/Cargo.toml
@@ -1,5 +1,6 @@
 [package]
 name = "lazy_static"
+# NB: When modifying, also modify html_root_url in lib.rs
 version = "0.2.6"
 authors = ["Marvin Löbel <loebel.marvin@gmail.com>"]
 license = "MIT"
