Redhill: Fix typo in readme url

redhill/package.json

@@ -5,7 +5,7 @@
   "bugs": {
     "url": "https://github.com/Automattic/themes/issues"
   },
-  "homepage": "https://github.com/Automattic/themes/varia#readme",
+  "homepage": "https://github.com/Automattic/themes/redhill#readme",
   "devDependencies": {
     "@wordpress/browserslist-config": "^2.2.2",
     "autoprefixer": "^9.5.1",