Documentation/ABI/testing/debugfs-cxl: Fix "Unexpected indentation"

Documentation/ABI/testing/debugfs-cxl: Fix "Unexpected indentation"

Stephen reported that an htmldocs build hit:

   Documentation/ABI/testing/debugfs-cxl:38: ERROR: Unexpected indentation.

It turns out that line was fine but the tool was unhappy about some line
breaks in the table of values to error types.

It turns out that:

   make V=1 SPHINXDIRS="admin-guide" htmldocs

...can not be used to get more info about what is behind a documentation
build error. It was only pure luck that reflowing the text resulted in
an error message that seemed a imply a problem later on with line breaks
around the table.

Fixes: 8039804cfa73 ("cxl/core: Add CXL EINJ debugfs files")
Cc: Jonathan Corbet <corbet@lwn.net>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Closes: http://lore.kernel.org/r/20240314141313.7ba04aff@canb.auug.org.au
Cc: Ben Cheatham <Benjamin.Cheatham@amd.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>