Update project::update_environment to respect reinstall options

crates/uv/src/commands/project/mod.rs

@@ -319,7 +319,7 @@ pub(crate) async fn update_environment(
 
     // Check if the current environment satisfies the requirements
     let site_packages = SitePackages::from_executable(&venv)?;
-    if spec.source_trees.is_empty() {
+    if spec.source_trees.is_empty() && reinstall.is_none() {
         match site_packages.satisfies(&spec.requirements, &spec.constraints)? {
             // If the requirements are already satisfied, we're done.
             SatisfiesResult::Fresh {