Add blob-storage to Storing Data category

Author: stacy-qqq

versioned_sidebars/version-0.13-sidebars.json

@@ -257,6 +257,7 @@
       "type": "category",
       "label": "Storing Data",
       "items": [
+        "capabilities/server/blob-storage",
         "capabilities/server/redis",
         "capabilities/server/cache-helper",
         "capabilities/server/post-data"