Fix names for Rosé Pine themes (#3771)

This PR fixes the names of the Rosé Pine themes.

We want to keep the Unicode "é" in the theme name, both because this is
the actual name of the theme, and also to maintain parity with Zed1.

Release Notes:

- N/A

crates/theme_importer/Cargo.toml

@@ -7,6 +7,7 @@ publish = false
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+any_ascii = "0.3.2"
 anyhow.workspace = true
 clap = { version = "4.4", features = ["derive"] }
 convert_case = "0.6.0"