fix: use whoami for user/hostname queries again (#6311)

Cargo.toml

@@ -23,7 +23,7 @@ license = "ISC"
 readme = "README.md"
 repository = "https://github.com/starship/starship"
 # Note: MSRV is only intended as a hint, and only the latest version is officially supported in starship.
-rust-version = "1.74"
+rust-version = "1.76"
 description = """
 The minimal, blazing-fast, and infinitely customizable prompt for any shell! ☄🌌️
 """
@@ -47,7 +47,6 @@ clap = { version = "4.5.20", features = ["derive", "cargo", "unicode"] }
 clap_complete = "4.5.33"
 dirs = "5.0.1"
 dunce = "1.0.5"
-gethostname = "0.5.0"
 # default feature restriction addresses https://github.com/starship/starship/issues/4251
 gix = { version = "0.66.0", default-features = false, features = ["max-performance-safe", "revision"] }
 gix-features = { version = "0.38.2", optional = true }
@@ -88,6 +87,7 @@ unicode-width = "0.2.0"
 urlencoding = "2.1.3"
 versions = "6.3.2"
 which = "6.0.3"
+whoami = { version = "1.5.2", default-features = false }
 yaml-rust2 = "0.9.0"
 
 guess_host_triple = "0.1.4"