ld/doc: correct misrepresented wording

The file ld.texi contains two space-separated terms: 'subseque nt'. It was probably meant to be 'subsequent'.

Manual documentation in html format also contains this error. I submitted a patch for it too, which can be
viewed at this archive link: https://sourceware.org/pipermail/binutils/2026-May/149206.html

Signed-off-by: PranavRJoshi <pranavrjoshi1@gmail.com>