Prepare Release using 'release-plan' (#338)

Co-authored-by: github-actions[bot] <github-actions-bot@users.noreply.github.com>

.release-plan.json

@@ -1,17 +1,17 @@
 {
   "solution": {
     "ember-primitives": {
-      "impact": "minor",
-      "oldVersion": "0.20.0",
-      "newVersion": "0.21.0",
+      "impact": "patch",
+      "oldVersion": "0.21.0",
+      "newVersion": "0.21.1",
       "constraints": [
         {
-          "impact": "minor",
-          "reason": "Appears in changelog section :rocket: Enhancement"
+          "impact": "patch",
+          "reason": "Appears in changelog section :bug: Bug Fix"
         }
       ],
       "pkgJSONPath": "./ember-primitives/package.json"
     }
   },
-  "description": "## Release (2024-06-28)\n\nember-primitives 0.21.0 (minor)\n\n#### :rocket: Enhancement\n* `docs-app`, `ember-primitives`, `test-app`\n  * [#336](https://github.com/universal-ember/ember-primitives/pull/336) Support hash-only transitions in proper-links ([@mmun](https://github.com/mmun))\n  * [#325](https://github.com/universal-ember/ember-primitives/pull/325) Upgrade form-data-utils ([@NullVoxPopuli](https://github.com/NullVoxPopuli))\n\n#### :memo: Documentation\n* `docs-app`\n  * [#331](https://github.com/universal-ember/ember-primitives/pull/331) fix broken links in proper-links.md ([@johanrd](https://github.com/johanrd))\n\n#### :house: Internal\n* Other\n  * [#335](https://github.com/universal-ember/ember-primitives/pull/335) Re-roll lock, pin macros ([@NullVoxPopuli](https://github.com/NullVoxPopuli))\n* `docs-app`, `test-app`\n  * [#334](https://github.com/universal-ember/ember-primitives/pull/334) Get app watching working ([@NullVoxPopuli](https://github.com/NullVoxPopuli))\n\n#### Committers: 3\n- Martin Muñoz ([@mmun](https://github.com/mmun))\n- [@NullVoxPopuli](https://github.com/NullVoxPopuli)\n- [@johanrd](https://github.com/johanrd)\n"
+  "description": "## Release (2024-08-12)\n\nember-primitives 0.21.1 (patch)\n\n#### :bug: Bug Fix\n* `ember-primitives`\n  * [#352](https://github.com/universal-ember/ember-primitives/pull/352) Add layout export (for StickyFooter) -- this was missing, but mentioned in the docs ([@NullVoxPopuli](https://github.com/NullVoxPopuli))\n\n#### Committers: 1\n- [@NullVoxPopuli](https://github.com/NullVoxPopuli)\n"
 }

CHANGELOG.md

@@ -1,5 +1,16 @@
 # Changelog 
 
+## Release (2024-08-12)
+
+ember-primitives 0.21.1 (patch)
+
+#### :bug: Bug Fix
+* `ember-primitives`
+  * [#352](https://github.com/universal-ember/ember-primitives/pull/352) Add layout export (for StickyFooter) -- this was missing, but mentioned in the docs ([@NullVoxPopuli](https://github.com/NullVoxPopuli))
+
+#### Committers: 1
+- [@NullVoxPopuli](https://github.com/NullVoxPopuli)
+
 ## Release (2024-06-28)
 
 ember-primitives 0.21.0 (minor)

ember-primitives/package.json

@@ -1,6 +1,6 @@
 {
   "name": "ember-primitives",
-  "version": "0.21.0",
+  "version": "0.21.1",
   "description": "Making apps easier to build",
   "sideEffects": [
     "*.css"