[build:Makefile] Fix man pages generated by pandoc>=3 (yt-dlp#7047)

Closes yt-dlp#7046, Closes yt-dlp#8481
Authored by: t-nil

Makefile

@@ -42,7 +42,7 @@ PYTHON ?= /usr/bin/env python3
 SYSCONFDIR = $(shell if [ $(PREFIX) = /usr -o $(PREFIX) = /usr/local ]; then echo /etc; else echo $(PREFIX)/etc; fi)
 
 # set markdown input format to "markdown-smart" for pandoc version 2 and to "markdown" for pandoc prior to version 2
-MARKDOWN = $(shell if [ `pandoc -v | head -n1 | cut -d" " -f2 | head -c1` = "2" ]; then echo markdown-smart; else echo markdown; fi)
+MARKDOWN = $(shell if [ `pandoc -v | head -n1 | cut -d" " -f2 | head -c1` -ge "2" ]; then echo markdown-smart; else echo markdown; fi)
 
 install: lazy-extractors yt-dlp yt-dlp.1 completions
 	mkdir -p $(DESTDIR)$(BINDIR)