man: Update to version 2.13.1

man: Update to version 2.13.1

- Update from version 2.13.0 to 2.13.1
- Update of rootfile
- Changelog
    2.13.1
	Fixes:
	 * Fix various minor formatting issues in manual pages.
	 * Tolerate additional spaces in preprocessor strings.
	 * Fix check for generated source files in out-of-tree builds.
	 * Fix building with the `musl` C library.
	Improvements:
	 * Recognize another Ukrainian translation of the `NAME` section.
	 * Increase the maximum size of the `NAME` section from 8192 to 16384 bytes.

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>