add image for scalar_data.from_tiff__rgb example test

assets/tests/images/README.md

@@ -6,43 +6,45 @@ This directory contains test images generated on the following platform:
 ```bash
 
 ----------------------------------------------------------------------------------------
-  Date: Sun Jan 14 00:16:57 2024 GMT
+  Date: Wed Mar 06 08:36:15 2024 GMT
 
                   OS : Linux
               CPU(s) : 4
              Machine : x86_64
         Architecture : 64bit
+                 RAM : 7.7 GiB
          Environment : Python
+         File system : ext4
           GPU Vendor : Intel Open Source Technology Center
         GPU Renderer : Mesa DRI Intel(R) HD Graphics 4000 (IVB GT2)
          GPU Version : 4.2 (Core Profile) Mesa 20.0.8
 
-  Python 3.12.1 | packaged by conda-forge | (main, Dec 23 2023, 08:03:24) [GCC 12.3.0]
+  Python 3.12.2 | packaged by conda-forge | (main, Feb 16 2024, 20:50:58) [GCC 12.3.0]
 
              cartopy : 0.22.0
                click : 8.1.7
  click-default-group : 1.2.4
-             cmocean : 3.0.3
+             cmocean : 3.1.3
             colorcet : 3.0.1
-            geovista : 0.5.0.dev170
-          matplotlib : 3.8.2
+            geovista : 0.5.0.dev263
+          matplotlib : 3.8.3
              netcdf4 : 1.6.5
-               numpy : 1.26.3
-        platformdirs : 4.1.0
-               pooch : 1.8.0
-            pykdtree : 1.3.10
+               numpy : 1.26.4
+        platformdirs : 4.2.0
+               pooch : 1.8.1
+            pykdtree : 1.3.11
               pyproj : 3.6.1
-             pyvista : 0.43.1
+             pyvista : 0.43.3
               scooby : 0.9.2
                  vtk : 9.2.6
-             IPython : 8.20.0
-         fastparquet : 2023.10.1
+             IPython : 8.22.1
+         fastparquet : 2024.2.0
 jupyter_server_proxy : 4.1.0
-        nest_asyncio : 1.5.8
-              pandas : 2.1.4
-               trame : 3.5.1
-        trame_client : 2.14.2
-        trame_server : 2.15.0
-           trame_vtk : 2.7.0
+        nest_asyncio : 1.6.0
+              pandas : 2.2.1
+               trame : 3.5.2
+        trame_client : 2.16.0
+        trame_server : 2.17.2
+           trame_vtk : 2.8.5
 ----------------------------------------------------------------------------------------
 ```