Remove executable bit from images for docs lint
This was causing a docs lint failure in https://gitlab.com/gitlab-org/gitlab-ee/-/jobs/40901316.
Before Width: | Height: | Size: 47 KiB After Width: | Height: | Size: 47 KiB |
Before Width: | Height: | Size: 44 KiB After Width: | Height: | Size: 44 KiB |
Before Width: | Height: | Size: 16 KiB After Width: | Height: | Size: 16 KiB |
Before Width: | Height: | Size: 60 KiB After Width: | Height: | Size: 60 KiB |