Update app icons (#743)

* Update podgrab icon

* Update Ombi icon

* Update phpldapadmin icon

charts/incubator/podgrab/Chart.yaml

@@ -8,7 +8,7 @@ deprecated: false
 description: A self-hosted podcast manager to download episodes as soon as they become
   live.
 home: https://github.com/truecharts/apps/tree/master/charts/incubator/podgrab
-icon: https://truecharts.org/_static/img/podgrab-icon.png
+icon: https://upload.wikimedia.org/wikipedia/commons/thumb/e/e7/Podcasts_%28iOS%29.svg/1024px-Podcasts_%28iOS%29.svg.png
 keywords:
 - podgrab
 kubeVersion: '>=1.16.0-0'
@@ -24,4 +24,4 @@ sources:
 - https://github.com/akhilrex/podgrab
 - https://hub.docker.com/r/akhilrex/podgrab
 type: application
-version: 4.4.0
+version: 4.4.1

charts/incubator/podgrab/SCALE/item.yaml

@@ -1,3 +1,3 @@
 categories:
   - mutlimedia
-icon_url: https://truecharts.org/_static/img/podgrab-icon.png
+icon_url: https://upload.wikimedia.org/wikipedia/commons/thumb/e/e7/Podcasts_%28iOS%29.svg/1024px-Podcasts_%28iOS%29.svg.png