ripgrep: restore fish completions

This reverts commit ca7e4a44fe.

fish-shell removed the file
f036d01961

srcpkgs/ripgrep/template

@@ -1,7 +1,7 @@
 # Template file for 'ripgrep'
 pkgname=ripgrep
 version=11.0.2
-revision=3
+revision=4
 build_style=cargo
 configure_args="--features=pcre2"
 hostmakedepends="asciidoc pkg-config"
@@ -21,4 +21,5 @@ post_install() {
 	cd "target/${RUST_TARGET}/release/build/ripgrep-"*/out
 	vman rg.1
 	vinstall rg.bash 0644 usr/share/bash-completion/completions rg
+	vinstall rg.fish 0644 usr/share/fish/vendor_completions.d
 }