Add example of adding as git dependency in deps.edn

Author: DerGuteMoritz

README.md

@@ -13,6 +13,8 @@ Leiningen:
 deps.edn:
 ```clojure
 aleph/aleph {:mvn/version "0.5.0"}
+;; alternatively
+io.github.clj-commons/aleph {:git/sha "..."}
 ```
 
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