Fix sed parameters

Signed-off-by: Peter Nied <[email protected]>

action.yml

@@ -39,7 +39,7 @@ runs:
 
     - run: |
         declare -i approvals_count=0
-        maintainers_padded=" $(echo ${{ inputs.maintainers }} | tr ',' ' ' | sed s/ \+/ /g)  " # Padding before and after for substring safety check below
+        maintainers_padded=" $(echo ${{ inputs.maintainers }} | tr ',' ' ' | sed 's/  */ /g')  " # Padding before and after for substring safety check below
         maintainer_approvals=""
         for user in $approvers; do
           # Match with strings padding the username on both sides to avoid substring matches