Add `$schema` to `cgmanifest.json` (#713)

Co-authored-by: Jamie Magee <jamie.magee@microsoft.com>
Co-authored-by: Matt VanderKolk <mava@microsoft.com>
Co-authored-by: Sahil Ashar <saashar@microsoft.com>

cgmanifest.json

@@ -1,45 +1,46 @@
 {
-    "Registrations": [ 
+  "$schema": "https://json.schemastore.org/component-detection-manifest.json",
-        {
+  "Registrations": [
-            "Component": { 
+    {
-                "Type": "maven", 
+      "Component": {
-                "maven": { 
+        "Type": "maven",
-                    "GroupId": "com.squareup.okhttp3", 
+        "maven": {
-                    "ArtifactId": "okhttp", 
+          "GroupId": "com.squareup.okhttp3",
-                    "Version": "4.9.1" 
+          "ArtifactId": "okhttp",
-                }
+          "Version": "4.9.1"
-            },
-            "DevelopmentDependency" : false
-        },
-        {
-            "Component": { 
-                "Type": "git", 
-                "git": { 
-                    "RepositoryUrl": "https://github.com/zaphoyd/websocketpp", 
-                    "CommitHash": "c6d7e295bf5a0ab9b5f896720cc1a0e0fdc397a7" 
-                }
-            },
-            "DevelopmentDependency" : false
-        },
-        {
-            "Component": { 
-                "Type": "git", 
-                "git": { 
-                    "RepositoryUrl": "https://github.com/chriskohlhoff/asio", 
-                    "CommitHash": "22afb86087a77037cd296d27134756c9b0d2cb75" 
-                }
-            },
-            "DevelopmentDependency" : false
-        },
-        {
-            "Component": { 
-                "Type": "git", 
-                "git": { 
-                    "RepositoryUrl": "https://github.com/openssl/openssl", 
-                    "CommitHash": "d1c28d791a7391a8dc101713cd8646df96491d03" 
-                }
-            },
-            "DevelopmentDependency" : false
         }
-    ]
+      },
-}
+      "DevelopmentDependency": false
+    },
+    {
+      "Component": {
+        "Type": "git",
+        "git": {
+          "RepositoryUrl": "https://github.com/zaphoyd/websocketpp",
+          "CommitHash": "c6d7e295bf5a0ab9b5f896720cc1a0e0fdc397a7"
+        }
+      },
+      "DevelopmentDependency": false
+    },
+    {
+      "Component": {
+        "Type": "git",
+        "git": {
+          "RepositoryUrl": "https://github.com/chriskohlhoff/asio",
+          "CommitHash": "22afb86087a77037cd296d27134756c9b0d2cb75"
+        }
+      },
+      "DevelopmentDependency": false
+    },
+    {
+      "Component": {
+        "Type": "git",
+        "git": {
+          "RepositoryUrl": "https://github.com/openssl/openssl",
+          "CommitHash": "d1c28d791a7391a8dc101713cd8646df96491d03"
+        }
+      },
+      "DevelopmentDependency": false
+    }
+  ]
+}