Remove last reference to gitlab (#8)

Signed-off-by: Alexandre Peixoto Ferreira <[email protected]>

Author: alexandref75

charts/smarter-device-manager/Chart.yaml

@@ -11,7 +11,7 @@ keywords:
   - hardware
 sources:
   - https://github.com/smarter-project/smarter-device-manager
-icon: https://gitlab.com/uploads/-/system/group/avatar/59012546/ARM1636_Project_Logo_ST2_RGB_V1.png
+icon: https://github.com/smarter-project/documentation/raw/main/ARM1636_Project_Logo_ST2_RGB_V1.png
 annotations:
   artifacthub.io/changes: |
     - Fix template