Update release-lambda.yml (aws-observability#1029)

*Description of changes:*
Lambda container users can download the layer artifact file from assets.

By submitting this pull request, I confirm that my contribution is made
under the terms of the Apache 2.0 license.

Author: wangzlei

.github/workflows/release-lambda.yml

@@ -154,23 +154,20 @@ jobs:
     steps:
       - name: Checkout Repo @ SHA - ${{ github.sha }}
         uses: actions/checkout@v4
-
       - uses: hashicorp/setup-terraform@v2
-
       - name: download layerARNs
         uses: actions/download-artifact@v4
         with:
-          name: ${{ env.LAYER_NAME }}
+          pattern: ${{ env.LAYER_NAME }}-*
           path: ${{ env.LAYER_NAME }}
-
+          merge-multiple: true
       - name: show layerARNs
         run: |
           for file in ${{ env.LAYER_NAME }}/*
           do
           echo $file
           cat $file
           done
-
       - name: generate layer-note
         working-directory: ${{ env.LAYER_NAME }}
         run: |
@@ -181,38 +178,49 @@ jobs:
           read arn < $file
           echo "| " $file " | " $arn " |" >> ../layer-note
           done
-          cd ..
-          cat layer-note
-
+          cat ../layer-note
       - name: generate tf layer
         working-directory: ${{ env.LAYER_NAME }}
         run: |
-          echo "locals {" >> ../layer.tf
-          echo "  sdk_layer_arns = {" >> ../layer.tf
+          echo "locals {" >> ../layer_arns.tf
+          echo "  sdk_layer_arns = {" >> ../layer_arns.tf
           for file in *
           do
           read arn < $file
-          echo "    \""$file"\" = \""$arn"\"" >> ../layer.tf
+          echo "    \""$file"\" = \""$arn"\"" >> ../layer_arns.tf
           done
           cd ..
-          echo "  }" >> layer.tf
-          echo "}" >> layer.tf
-          terraform fmt layer.tf
-          cat layer.tf
-
-      - name: upload layer tf file
-        uses: actions/upload-artifact@v4
+          echo "  }" >> layer_arns.tf
+          echo "}" >> layer_arns.tf
+          terraform fmt layer_arns.tf
+          cat layer_arns.tf
+      - name: download layer.zip
+        uses: actions/download-artifact@v4
         with:
-          name: layer.tf
-          path: layer.tf
-
+          name: layer.zip
+      - name: Get commit hash
+        id: commit
+        run: echo "sha_short=$(git rev-parse --short HEAD)" >> $GITHUB_OUTPUT
+      - name: Create Release Notes
+        run: |
+          echo "AWS OpenTelemetry Lambda Layer for Java version ${{ github.event.inputs.version }}-${{ steps.commit.outputs.sha_short }}" > release_notes.md
+          echo "" >> release_notes.md
+          echo "" >> release_notes.md
+          echo "See new Lambda Layer ARNs:" >> release_notes.md
+          echo "" >> release_notes.md
+          cat layer-note >> release_notes.md
+          echo "" >> release_notes.md
+          echo "Notes:" >> release_notes.md
       - name: Create GH release
         id: create_release
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} # This token is provided by Actions, you do not need to create your own token
         run: |
           gh release create --target "$GITHUB_REF_NAME" \
-             --title "Release lambda-v${{ github.event.inputs.version }}" \
+             --title "Release lambda-v${{ github.event.inputs.version }}-${{ steps.commit.outputs.sha_short }}" \
+             --notes-file release_notes.md  \
              --draft \
-             "lambda-v${{ github.event.inputs.version }}" \
-             layer.tf
+             "lambda-v${{ github.event.inputs.version }}-${{ steps.commit.outputs.sha_short }}" \
+             layer_arns.tf layer.zip
+          echo Removing release_notes.md ...
+          rm -f release_notes.md