docs: Updated installation instructions

Author: SolidAlloy

README.md

@@ -15,32 +15,31 @@ This is a fork of the currently inactive project by Rotorz: [ClassTypeReference
 
 ### Install with OpenUPM
 
-Once you have the OpenUPM cli, run the following command:
+Once you have the [OpenUPM cli](https://github.com/openupm/openupm-cli#installation), run the following command:
 
 ```openupm install com.solidalloy.type-references```
 
 Or if you don't have it, add the scoped registry to manifest.json with the desired dependency semantic version: 
+
 ```json
   "scopedRegistries": [
     {
       "name": "package.openupm.com",
       "url": "https://package.openupm.com",
       "scopes": [
-        "com.solidalloy.util",
-        "com.solidalloy.unity-dropdown",
-        "com.solidalloy.type-references",
+        "com.solidalloy",
         "com.openupm",
         "org.nuget"
       ]
     }
   ],
   "dependencies": {
-    "com.solidalloy.type-references": "2.15.0"
+    "com.solidalloy.type-references": "2.15.1"
   },
 
 ```
 
-### Install via Git URL
+### Install via Package Manager
 
 Project supports Unity Package Manager. To install the project as a Git package do the following: