fix dependency conflicts related to wit-bindgen (#1888)

This temporarily points to my fork of `wit-bindgen` until
bytecodealliance/wit-bindgen#700 is merged.

Signed-off-by: Joel Dice <joel.dice@fermyon.com>

Cargo.toml

@@ -15,7 +15,8 @@ form_urlencoded = "1.0"
 http_types = { package = "http", version = "0.2" }
 spin-macro = { path = "macro" }
 thiserror = "1.0.37"
-wit-bindgen = { git = "https://github.com/bytecodealliance/wit-bindgen", rev = "46fba30bb667a3a4962f63b1cc28b84427b49114" }
+# TODO: switch this back to upstream once https://github.com/bytecodealliance/wit-bindgen/pull/700 is merged
+wit-bindgen = { git = "https://github.com/dicej/wit-bindgen", rev = "60195574dc59f9ba56801a0c7fe5bba1382592d1" }
 routefinder = "0.5.3"
 serde_json = { version = "1.0.96", optional = true }
 serde = { version = "1.0.163", optional = true }