gtexinfo: update to 7.0.1.

7.0.1 (30 November 2022)
This is a bug-fix release with minimal changes.

* texi2any
  . avoid crashes on empty @image argument and other potential crashes
    (with "Can't use an undefined value as an ARRAY reference" message)
  . avoid hang on @ref command inside section command

* info
  . fix recoding of UTF-8 files to ASCII when run in C locale

* js
  . index search fixed for new HTML output
  . some obsolete files removed from distribution

(wiz)