Fix as-pattern for GHC 9

[ScottFreeCode]

Based on the below; resolves an error, "Suffix occurrence of @. For an as-pattern, remove the leading whitespace."

https://stackoverflow.com/questions/67972231/syntax-for-lazy-pattern-matching-with-as-syntax

https://gitlab.haskell.org/ghc/ghc/-/wikis/migration/9.0#whitespace-sensitive-and-

With the combination of #19, #21 and this, the binary builds on current GHC and dependency package set versions.