calculating hash using old unnormalized URLs will most likely produce
the same old invalid hash, this commit normalizes URLs first and then
calculate new hash, updating old URLs as well.

update header

reasons:
- no need to pin java, because weepinbell is meant to be compatible with
any Java version higher then 17
- no need to pin clojure, because it's already pinned in project.clj as
a dependency
- no need to pin leiningen, because features we rely on don't really
have version differences