Update baseline images for test_grdimage_image

[seisman]

Address #2961.

[github-actions]

Summary of changed images

This is an auto-generated report of images that have changed on the DVC remote

Status	Path
modified	pygmt/tests/baseline/test_grdimage_image.png

Image diff(s)

Added images

Modified images

Path	Old	New
test_grdimage_image.png

Report last updated at commit 122d76c

[weiji14]

Somehow test_grdimage_global_subset is still failing on macOS, even though it was updated in #2984

_________________________ test_grdimage_global_subset __________________________
Error: Image files did not match.
  RMS Value: 2.8383277580633415
  Expected:  
    /Users/runner/work/pygmt/pygmt/tmp-test-dir-with-unique-name/results/pygmt.tests.test_grdimage.test_grdimage_global_subset/baseline.png
  Actual:    
    /Users/runner/work/pygmt/pygmt/tmp-test-dir-with-unique-name/results/pygmt.tests.test_grdimage.test_grdimage_global_subset/result.png
  Difference:
    /Users/runner/work/pygmt/pygmt/tmp-test-dir-with-unique-name/results/pygmt.tests.test_grdimage.test_grdimage_global_subset/result-failed-diff.png
  Tolerance: 
    2

Maybe just fix it here?

[weiji14]

Oops too late, need to open another PR then 😅

[seisman]

😅 Will open a separate PR.