fix: changed "Done" to "DONE"

I prefer to directly change the doc upstream instead of changing
Mesamatrix.net code to add case-insensitivity in the parser. Otherwise,
there could be unwanted side effects due to the fact that features.txt
format is pretty loose.
14 jobs for !747 with fix_doc in 9 minutes and 10 seconds (queued for 4 seconds)
latest detached
Status Job ID Name Coverage
  Containers Build
passed #266316
debian

00:01:01

 
  Build+Test
passed #266318
meson-clang

00:07:19

passed #266324
meson-gallium-clover-llvm

00:03:26

passed #266325
meson-gallium-clover-llvm39

00:07:15

passed #266323
meson-gallium-drivers-other

00:04:09

passed #266322
meson-gallium-radeonsi

00:02:38

passed #266326
meson-gallium-st-other

00:07:15

passed #266317
meson-gallium-swr

00:04:41

passed #266321
meson-glvnd

00:03:10

passed #266320
meson-loader-classic-dri

00:03:20

passed #266319
meson-vulkan

00:02:28

passed #266328
scons-llvm

00:04:18

passed #266327
scons-nollvm

00:08:08

passed #266329
scons-swr

00:05:25