Use defer in Path tests

src/path.zig

@@ -370,7 +370,7 @@ test Path {
     // In the above example, `absolute_parts` is an array allocated onto the
     // stack, and as such will only be valid until the end of the scope. This
     // means no allocation is necessary, but it also means `absolute1` is only
-    // valid for as long as its parts.
+    // valid for as long as its parts are.
     // If a path instance is not immediately consumed and you're uncertain
     // about the lifetime of its parts, consider using `.clone(alloc)`.
 
@@ -431,6 +431,6 @@ test Path {
     // A deep clone of a path can be allocated using `.clone()`.
     // This clone owns the outer array and its inner strings.
     const twin = try another_relative.clone(alloc);
+    defer twin.deinit();
     try expect.fmt("mom/sister/child", "{}", .{twin});
-    twin.deinit();
 }