Non-spammy terraform plan comments for PRs

.github-workflows-terraform.yml

      - name: TF init
        run: terraform init
      - name: TF plan (color)
        run: terraform plan -var-file=prod.tfvars -out=planfile
      - name: Show plan (no color)
        id: plan
        run: terraform show -no-color planfile
      - name: Find Comment
        uses: peter-evans/find-comment@v1
        id: fc
        if: github.event_name == 'pull_request'
        with:
          issue-number: ${{ github.event.pull_request.number }}
          comment-author: 'github-actions[bot]'
          body-includes: Terraform Plan
      - name: Create or update comment
        uses: peter-evans/create-or-update-comment@v1
        if: github.event_name == 'pull_request'
        with:
          comment-id: ${{ steps.fc.outputs.comment-id }}
          issue-number: ${{ github.event.pull_request.number }}
          body: |
            Terraform Plan
            <details><summary>Show Plan</summary>
            ```
            ${{ steps.plan.outputs.stdout }}
            ```
            </details>
          edit-mode: replace