use file to make large body commits

Author: WyriHaximus

etc/workflow-skeleton/generate-{{ path }}.yaml

@@ -35,13 +35,10 @@ jobs:
         with:
           cmd: yq '.info.version' 'etc/specs/{{ path }}/previous.spec.yaml'
       - name: Generate spec diff
-        id: spec-diff
         run: |
-          curl -fsSL https://pb33f.io/openapi-changes/install.sh | sh 
-          delimiter="$(openssl rand -hex 8)"
-          echo "diff<<${delimiter}" >> "${GITHUB_OUTPUT}"
-          echo "$(openapi-changes summary --no-color --no-logo etc/specs/{{ path }}/current.spec.yaml etc/specs/{{ path }}/previous.spec.yaml || true)" >> "${GITHUB_OUTPUT}"
-          echo "${delimiter}" >> "${GITHUB_OUTPUT}"
+          curl -fsSL https://pb33f.io/openapi-changes/install.sh | sh
+          echo "Detected Schema changes:" >> "var/detected-schema-changes"
+          echo "$(openapi-changes summary --no-color --no-logo etc/specs/{{ path }}/current.spec.yaml etc/specs/{{ path }}/previous.spec.yaml || true)" >> "var/detected-schema-changes"
       - name: Update Client to {{ "${{ steps.look-current-up-spec-version.outputs.result }}" }}
         run: |
           make generate-client {{ path }}
@@ -57,9 +54,7 @@ jobs:
             Enhancement ✨
             {{ path }}
           title: "[{{ path }}] Update to {{ "${{ steps.look-current-up-spec-version.outputs.result }}" }} (hash: {{ "${{ steps.spec-hash.outputs.current }}" }}) from {{ "${{ steps.look-previous-up-spec-version.outputs.result }}" }} (hash: {{ "${{ steps.spec-hash.outputs.previous }}" }})"
-          body: |
-            Detected Schema changes:
-            {{ "${{ steps.spec-diff.outputs.diff }}" }}
+          body-path: "var/detected-schema-changes"
           commit-message: |
             [{{ path }}] Update to {{ "${{ steps.look-current-up-spec-version.outputs.result }}" }} (hash: {{ "${{ steps.spec-hash.outputs.current }}" }}) from {{ "${{ steps.look-previous-up-spec-version.outputs.result }}" }} (hash: {{ "${{ steps.spec-hash.outputs.previous }}" }})
             Detected Schema changes: