Change from unstable to alpha

Author: NullVoxPopuli

files/package.json

@@ -45,11 +45,11 @@
     "@embroider/vite": "^1.1.5",
     "@eslint/js": "^9.17.0",
     "@glimmer/component": "^2.0.0",<% if (typescript) { %>
-    "@glint/core": "unstable",
-    "@glint/environment-ember-loose": "unstable",
-    "@glint/environment-ember-template-imports": "unstable",
-    "@glint/tsserver-plugin": "unstable",
-    "@glint/template": "unstable",
+    "@glint/core": "^2.0.0-alpha.1",
+    "@glint/environment-ember-loose": "^2.0.0-alpha.1",
+    "@glint/environment-ember-template-imports": "^2.0.0-alpha.1",
+    "@glint/tsserver-plugin": "^2.0.0-alpha.1",
+    "@glint/template": "^1.6.0-alpha.1",
     "@ember/app-tsconfig": "^1.0.0",
     "@ember/library-tsconfig": "^1.0.0",<% } %>
     "@rollup/plugin-babel": "^6.0.4",<% if (typescript) { %>