fix config crate description
Summary:
'Configeration' does not exist outside of Meta ;)
Though apparently Heroku now has one too:
Fix spelling
@@ -5,7 +5,7 @@ name = "below-config"
version = "0.5.0"
authors = ["Daniel Xu <dlxu@fb.com>", "Facebook"]
edition = "2021"
-description = "Configerations for below"
+description = "Configurations for below"
repository = "https://github.com/facebookincubator/below"
license = "Apache-2.0"
