[cherry-pick] Update chart icon (#146)

/cherry-pick

Signed-off-by: Tamal Saha <tamal@appscode.com>

Co-authored-by: Tamal Saha <tamal@appscode.com>

charts/stash-mongodb/Chart.yaml

@@ -1,10 +1,10 @@
 apiVersion: v1
 description: 'stash-mongodb - MongoDB database plugin for Stash by AppsCode'
 name: stash-mongodb
-version: 4.1.4-beta.20200709
-appVersion: 4.1.4-beta.20200709
-home: https://github.com/stashed/mongodb
-icon: https://cdn.appscode.com/images/icon/stash.png
+version: v2020.07.09-beta.0
+appVersion: v2020.07.09-beta.0
+home: https://stash.run
+icon: https://cdn.appscode.com/images/products/stash/addons/mongodb-stash-addon.png
 sources:
 - https://github.com/stashed/mongodb
 maintainers: