fix(man): add missing name section to eza_colors-explanation manpage

Lintian the debian package linter complains, that man pages should
always start with a name section.

Signed-off-by: Sandro-Alessio Gierens <sandro@gierens.de>

man/eza_colors-explanation.5.md

@@ -1,3 +1,7 @@
+# Name
+
+eza_colors-explanation — more details on customizing eza colors
+
 # Eza Color Explanation
 
 eza provides its own built\-in set of file extension mappings that cover a large range of common file extensions, including documents, archives, media, and temporary files.