Adjust sed to account for the possibility of multiple arm64vX

Author: tianon

generate-stackbrew-library.sh

@@ -97,7 +97,7 @@ for version in "${versions[@]}"; do
 		if [ "$variant" = 'debian' ]; then
 			# no ppc64le for now: https://www.rabbitmq.com/debian/dists/testing/Release (no "ppc64el" in "Architectures")
 			# same with arm64
-			variantArches="$(echo " $variantArches " | sed -r -e 's/ (ppc64le|arm64v[^ ]+) / /g')"
+			variantArches="$(echo " $variantArches " | sed -r -e 's/ (ppc64le|arm64v[^ ]+)//g')"
 		fi
 
 		echo