fix(count_all_packs): add missed $ and remove redundant reassignment

Author: yinzara

src/sh/count_all_packs.sh

@@ -1,6 +1,5 @@
 #!/bin/bash
 
 value=$(git diff HEAD $(git rev-list --max-parents=0 HEAD) --name-only | grep packages | sed -E 's/^[^/]+\/([^/]+)\/.*$/\1/' | sort | uniq | wc -l)
-((value=value + 0))
 
-echo $value
+echo $((value + 0))