fix(workflows): standardize release notes generation and add prerelease labels

- Fix release-sdk.yml: Use file-based approach with --notes-file instead of
  complex inline string interpolation to avoid shell parsing errors with
  backticks and special characters

- Fix release.yml: Add --prerelease flag for nightly and preview releases
to properly mark them as pre-releases on GitHub

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

.github/workflows/release.yml

@@ -206,13 +206,22 @@ jobs:
           RELEASE_BRANCH: '${{ steps.release_branch.outputs.BRANCH_NAME }}'
           RELEASE_TAG: '${{ steps.version.outputs.RELEASE_TAG }}'
           PREVIOUS_RELEASE_TAG: '${{ steps.version.outputs.PREVIOUS_RELEASE_TAG }}'
+          IS_NIGHTLY: '${{ steps.vars.outputs.is_nightly }}'
+          IS_PREVIEW: '${{ steps.vars.outputs.is_preview }}'
         run: |-
+          # Set prerelease flag for nightly and preview releases
+          PRERELEASE_FLAG=""
+          if [[ "${IS_NIGHTLY}" == "true" || "${IS_PREVIEW}" == "true" ]]; then
+            PRERELEASE_FLAG="--prerelease"
+          fi
+
           gh release create "${RELEASE_TAG}" \
             dist/cli.js \
             --target "$RELEASE_BRANCH" \
             --title "Release ${RELEASE_TAG}" \
             --notes-start-tag "$PREVIOUS_RELEASE_TAG" \
-            --generate-notes
+            --generate-notes \
+            ${PRERELEASE_FLAG}
 
       - name: 'Create Issue on Failure'
         if: |-