fix: enable std feature for whoami crate (#7211)

Without the "std" feature enabled, whoami falls back to the stub
implementation and Starship shows anonymous@localhost regardless of the
actual user or hostname.

Cargo.lock

@@ -3877,6 +3877,16 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "web-sys"
+version = "0.3.83"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9b32828d774c412041098d182a8b38b16ea816958e07cf40eec2bc080ae137ac"
+dependencies = [
+ "js-sys",
+ "wasm-bindgen",
+]
+
 [[package]]
 name = "which"
 version = "8.0.0"
@@ -3896,6 +3906,7 @@ checksum = "86dc1eeef7866078951fc09f1857d3d33a37432fe376d7ff45449c8bb50318c1"
 dependencies = [
  "libredox",
  "wasite",
+ "web-sys",
 ]
 
 [[package]]