Fix homepage URL

Author: webholik

codegens/php-guzzle/package.json

@@ -25,7 +25,7 @@
   },
   "author": "Postman Labs <help@getpostman.com>",
   "license": "Apache-2.0",
-  "homepage": "https://github.com/postmanlabs/code-generators/tree/master/codegens/<<CODEGEN_NAME>>",
+  "homepage": "https://github.com/postmanlabs/code-generators/tree/master/codegens/php-guzzle",
   "dependencies": {},
   "devDependencies": {},
   "engines": {