Fix counting

Author: manics

ci/summarise-linkcheck-output

@@ -5,8 +5,8 @@
 set -eu
 LINKCHECK="$1"
 
-N_BROKEN=$(jq -r 'select(.status=="broken") | reduce inputs as $s(0;.+1)' "$LINKCHECK")
-N_REDIRECTED=$(jq -r 'select(.status=="redirected") | reduce inputs as $s(0;.+1)' "$LINKCHECK")
+N_BROKEN=$(jq -r 'select(.status=="broken")' "$LINKCHECK" | jq -s length)
+N_REDIRECTED=$(jq -r 'select(.status=="redirected")' "$LINKCHECK" | jq -s length)
 
 # shellcheck disable=SC2086
 if [[ $N_BROKEN -gt 0 ]]; then