19404: Improves reliability of release notes (#117)

Fixes an intermittent issue where the release notes that appear in the
body of GitHub releases include PR titles from older commits. We have
ditched the 3rd party release notes generator we were using in favor of
a new one + some proprietary code in our centralized workflow
repository.

.github/workflows/build.yml

@@ -418,6 +418,21 @@ jobs:
         npm install
         npm run test
 
+  generate-changelog:
+    if: inputs.build-type == 'release'
+    secrets: inherit
+    needs:
+      - smoke-test-linux-amd64
+      - smoke-test-linux-arm64
+      - smoke-test-linux-arm64_8a
+      - smoke-test-macos-amd64
+      - smoke-test-macos-amd64-large
+      - smoke-test-macos-amd64-on-arm64
+      - smoke-test-macos-arm64
+      - smoke-test-windows-amd64
+      - smoke-test-wasm64
+    uses: "howsoai/.github/.github/workflows/release-notes.yml@main"
+
   release:
     if: inputs.build-type == 'release'
     needs:
@@ -430,6 +445,7 @@ jobs:
       - smoke-test-macos-arm64
       - smoke-test-windows-amd64
       - smoke-test-wasm64
+      - generate-changelog
     runs-on: ubuntu-latest
     steps:
 
@@ -443,7 +459,7 @@ jobs:
         commit: ${{ github.sha }}
         name: "Amalgam ${{ inputs.version }}"
         artifactErrorsFailBuild: true
-        generateReleaseNotes: true
+        body: ${{ needs.generate-changelog.outputs.changelog }}
         makeLatest: legacy
         artifacts: amalgam-*/amalgam-*.tar.gz
-        artifactContentType: application/gzip
+        artifactContentType: application/gzip