Fix the tests-done github actions step, again

.github/workflows/tests.yml

@@ -370,10 +370,13 @@ jobs:
         # the `jq` incantation dumps out a series of "<job> <result>" lines
         run: |
           set -o pipefail
+          rc=0
           jq -r 'to_entries[] | [.key,.value.result] | join(" ")' \
                           <<< $NEEDS_CONTEXT |
               while read job result; do
                   if [ "$result" != "success" ]; then
                       echo "::set-failed ::Job $job returned $result"
+                      rc=1
                   fi
               done
+          exit $rc

changelog.d/10512.misc

@@ -0,0 +1 @@
+Update the `tests-done` Github Actions status.