testing/cocogitto: let abuild handle manpage compression

Simplifies APKBUILD and allows abuild decide which compression to use.

testing/cocogitto/APKBUILD

 maintainer="Thomas Böhler <witcher@wiredspace.de>"
 pkgname=cocogitto
 pkgver=6.2.0
-pkgrel=0
+pkgrel=1
 pkgdesc="The Conventional Commits toolbox"
 url="https://docs.cocogitto.io/"
 # loongarch64: blocked by libc crate
@@ -46,10 +46,7 @@ package() {
 
 	install -Dm644 -t "$pkgdir"/usr/share/licenses/"$pkgname" LICENSE
 
-	for i in man/*.1; do
-		gzip "$i"
-		install -Dm644 -t "$pkgdir"/usr/share/man/man1 "$i".gz
-	done
+	install -Dm644 -t "$pkgdir"/usr/share/man/man1 man/*.1
 
 	install -Dm644 cog.bash \
 		"$pkgdir"/usr/share/bash-completion/completions/cog