man ip-link: Fix indentation for 'ip link show' options

man ip-link: Fix indentation for 'ip link show' options

BEFORE:
              The show command has additional formatting options:

       -s, -stats, -statistics
              output more statistics about packet usage.

       -d, -details
              output more detailed information.

       -h, -human, -human-readble
              output statistics with human readable values number followed by suffix

       -iec   print human readable rates in IEC units (ie. 1K = 1024).
AFTER:
       The show command has additional formatting options:

              -s, -stats, -statistics
                     output more statistics about packet usage.

              -d, -details
                     output more detailed information.

              -h, -human, -human-readble
                     output statistics with human readable values number followed by suffix

              -iec   print human readable rates in IEC units (ie. 1K = 1024).

Signed-off-by: Vadim Kochan <vadim4j@gmail.com>