Rename extension/contributions

Remove superfluous naming.

Author: percyhanna

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@aha-develop/github",
-  "description": "GitHub integration",
+  "description": "GitHub",
   "version": "1.3.0",
   "author": "Aha! (support@aha.io)",
   "repository": {
@@ -58,7 +58,7 @@
       },
       "commands": {
         "sync": {
-          "title": "GitHub: Sync pull requests",
+          "title": "Sync pull requests",
           "entryPoint": "src/commands/sync.js",
           "commandType": "recordAction",
           "recordTypes": [
@@ -68,7 +68,7 @@
           ]
         },
         "addLink": {
-          "title": "GitHub: Link pull request to record",
+          "title": "Link pull request to record",
           "entryPoint": "src/commands/addLink.js",
           "commandType": "recordAction",
           "recordTypes": [
@@ -78,7 +78,7 @@
           ]
         },
         "removeLinks": {
-          "title": "GitHub: Remove linked pull requests from record",
+          "title": "Remove linked pull requests from record",
           "entryPoint": "src/commands/removeLinks.js",
           "commandType": "recordAction",
           "recordTypes": [