fix(icons): changed git-branch icon (#3938)

* Updated icons/git-branch.svg

* Updated icons/git-branch.json

icons/git-branch.json

@@ -3,7 +3,8 @@
   "contributors": [
     "colebemis",
     "csandman",
-    "ericfennis"
+    "ericfennis",
+    "jguddas"
   ],
   "tags": [
     "code",

icons/git-branch.svg

@@ -9,8 +9,7 @@
   stroke-linecap="round"
   stroke-linejoin="round"
 >
-  <line x1="6" x2="6" y1="3" y2="15" />
+  <path d="M15 6a9 9 0 0 0-9 9V3" />
   <circle cx="18" cy="6" r="3" />
   <circle cx="6" cy="18" r="3" />
-  <path d="M18 9a9 9 0 0 1-9 9" />
 </svg>