chore(release): 4.21.1 [skip ci]

## [4.21.1](https://github.com/bmadcode/BMAD-METHOD/compare/v4.21.0...v4.21.1) (2025-06-30)

### Bug Fixes

* readme clarifies that the installer handles installs upgrades and expansion installation ([9371a57](9371a5784f))

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "bmad-method",
-  "version": "4.21.0",
+  "version": "4.21.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "bmad-method",
-      "version": "4.21.0",
+      "version": "4.21.1",
       "license": "MIT",
       "dependencies": {
         "@kayvan/markdown-tree-parser": "^1.5.0",