Update logo and add tags and preview flag

azure-devops-extension.json

@@ -2,12 +2,19 @@
     "manifestVersion": 1,
     "id": "enhanced-sprint-history",
     "publisher": "JamesSkemp",
-    "version": "0.0.53",
+    "version": "0.0.54",
     "name": "Enhanced Sprint History",
     "description": "Azure DevOps Extension",
     "categories": [
         "Azure Boards"
     ],
+    "tags": [
+        "agile",
+        "burndown"
+    ],
+    "galleryFlags": [
+        "Preview"
+    ],
     "targets": [
         {
             "id": "Microsoft.VisualStudio.Services"