Fix compilation on Android (#166)

Co-authored-by: guihkx <guihkx@users.noreply.github.com>

src/steps/os/android.rs

@@ -1,6 +1,7 @@
 use crate::execution_context::ExecutionContext;
 use crate::terminal::print_separator;
 use crate::utils::require;
+use crate::utils::which;
 use crate::Step;
 use color_eyre::eyre::Result;
 
@@ -10,7 +11,7 @@ pub fn upgrade_packages(ctx: &ExecutionContext) -> Result<()> {
 
     print_separator("Termux Packages");
 
-    let is_nala = pkg.end_with("nala");
+    let is_nala = pkg.ends_with("nala");
 
     let mut command = ctx.run_type().execute(&pkg);
     command.arg("upgrade");