Fix images and links parsing in doku_to_markdown

Signed-off-by: Skia <skia@libskia.so>
1 job for wip in 4 minutes and 29 seconds (queued for 241 minutes and 20 seconds)
Status Job ID Name Coverage
  Test
failed #1029
test

00:04:29

 
Name Stage Failure
failed
test Test There is an unknown failure, please try again

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Ran 42 tests in 62.779s

FAILED (failures=1)
Custom settings failed
Creating test database for alias 'default'...
Destroying test database for alias 'default'...
ERROR: Job failed: exit code 1