skip_changelog: Fix workflow outputs syntax

Use the correct syntax for getting the output from a workflow job.

Signed-off-by: Ben Kochie <superq@gmail.com>

.github/scripts/discover_role_repos.sh

@@ -1,6 +1,12 @@
 #!/usr/bin/env bash
+#
+# Description: Discover the upstream repo from each role default vars.
 
-for defaults_file in roles/*/vars/main.yml ; do
+result=$(
+  for defaults_file in roles/*/vars/main.yml ; do
     role="$(echo "${defaults_file}" | cut -f2 -d'/')"
     yq eval "[{\"repo\": ._${role}_repo, \"role\": \"${role}\"}]" "${defaults_file}"
-done | yq -o json -I=0
+  done | yq -o json -I=0
+)
+
+echo "result=${result}"

.github/workflows/version_bumper.yml

@@ -12,15 +12,15 @@ jobs:
   discover-role-repos:
     runs-on: ubuntu-latest
     outputs:
-      role-repos: ${{ steps.discovered-role-repos.outputs.result }}
+      role-repos: ${{ steps.discover.outputs.result }}
     container:
       image: quay.io/prometheus/golang-builder:base
     steps:
       - uses: actions/checkout@v3
 
       - name: Get repos for each role
-        id: discovered-role-repos
-        run: ./.github/scripts/discover_role_repos.sh
+        id: discover
+        run: ./.github/scripts/discover_role_repos.sh >> "$GITHUB_OUTPUT"
 
   check_for_new_versions:
     runs-on: ubuntu-latest