Fixing icons in netdata/netdata repo (#15647)

* Fixing icons

---------

Co-authored-by: Emmanuel Vasilakis <mrzammler@mm.st>

collectors/cgroups.plugin/metadata.yaml

@@ -9,7 +9,7 @@ modules:
         link: ""
         categories:
           - data-collection.containers-and-vms
-        icon_filename: netdata.png
+        icon_filename: container.svg
       related_resources:
         integrations:
           list: []
@@ -975,7 +975,7 @@ modules:
       monitored_instance:
         name: Virtual Machines
         link: ""
-        icon_filename: netdata.png
+        icon_filename: container.svg
         categories:
           - data-collection.containers-vms
       keywords:
@@ -1028,7 +1028,7 @@ modules:
       monitored_instance:
         name: oVirt Containers
         link: ""
-        icon_filename: ovirt.png
+        icon_filename: ovirt.svg
         categories:
           - data-collection.containers-vms
       keywords:

collectors/python.d.plugin/gearman/metadata.yaml

@@ -8,7 +8,7 @@ modules:
         link: "http://gearman.org/"
         categories:
           - data-collection.distributed-computing-systems
-        icon_filename: "gearman.svg"
+        icon_filename: "gearman.png"
       related_resources:
         integrations:
           list: []