testing/mqttui: fix bash completion file name

testing/mqttui/APKBUILD

@@ -35,7 +35,7 @@ package() {
 	cargo install --locked --path . --root="$pkgdir/usr"
 	rm "$pkgdir"/usr/.crates*
 
-	install -Dm644 "target/completions/$pkgname.bash" -t "$pkgdir"/usr/share/bash-completion/completions/
+	install -Dm644 "target/completions/$pkgname.bash" "$pkgdir"/usr/share/bash-completion/completions/$pkgname
 	install -Dm644 "target/completions/$pkgname.fish" -t "$pkgdir"/usr/share/fish/completions/
 	install -Dm644 "target/completions/_$pkgname" -t "$pkgdir"/usr/share/zsh/site-functions/
 }