Relax upper bound to accommodate dependency on `ansi-terminal-1.0`

[mpilgrem]

ansi-terminal-1.0 is released on Hackage.

See also commercialhaskell/stackage#6976.

Based on my tests, this is really only a bounds change. I tested by building with Stack >= 2.9.3 and modified stack.yaml:

# resolver: lts-13.23
resolver: lts-20.21 # GHC 9.2.7
packages: [.]

extra-deps:
- ansi-terminal-1.0
- ansi-terminal-types-0.11.5

allow-newer: true
allow-newer-deps:
- ansi-wl-pprint