Update release version regex

Signed-off-by: Nathan LeClaire <[email protected]>

script/release.sh

@@ -40,7 +40,7 @@ if [[ -z "${VERSION}" ]]; then
   exit 1
 fi
 
-if [[ ! "${VERSION}" =~ ^[0-9]\.[0-9](\.[0-9])?(-rc[1-9][0-9]*)?$ ]]; then
+if [[ ! "${VERSION}" =~ ^[0-9]\.[0-9]+(\.[0-9])+(-rc[1-9][0-9]*)?$ ]]; then
   echo "Invalid version. It should look like 0.5.1, 0.6 or 0.5.1-rc2"
   exit 1
 fi