Update src/url.zig

Co-authored-by: Sjors <[email protected]>

Author: karlseguin

src/url.zig

@@ -153,18 +153,11 @@ pub const URL = struct {
                 std.debug.assert(out[out_i - 1] == '/');
 
                 out_i -= 2;
-                while (out_i > 1) {
-                    const next = out_i - 1;
-                    if (out[next] == '/') {
-                        // <= to deal with the hack-ish protocol_end which will be
-                        // off-by-one between http and https
-                        if (out_i <= protocol_end) {
-                            return error.InvalidURL;
-                        }
-                        break;
-                    }
-                    out_i = next;
+                while (out_i > 1 and out[out_i - 1] != '/') {
+                    out_i -= 1; 
                 }
+                // <= to deal with the hack-ish protocol_end which will be off-by-one between http and https
+                if (out_i <= protocol_end) return error.InvalidURL;
                 in_i += 3;
                 continue;
             }