ci: update to release-please@4, set add hfix for hidden fixes

Author: collindutter

.github/.release-please-manifest.backport.json

@@ -0,0 +1,3 @@
+{
+  ".": "1.4.0"
+}

.github/.release-please-manifest.main.json

@@ -0,0 +1,3 @@
+{
+  ".": "1.4.0"
+}

.github/release-please-config.json

@@ -0,0 +1,67 @@
+{
+  "packages": {
+    ".": {
+      "versioning": "always-bump-minor",
+      "release-type": "python",
+      "changelog-sections": [
+        {
+          "type": "fix",
+          "section": "🐛 Bug Fixes"
+        },
+        {
+          "type": "hfix",
+          "section": "🤫 Bug Fixes",
+          "hidden": false
+        },
+        {
+          "type": "perf",
+          "section": "🚀 Performance Improvements"
+        },
+        {
+          "type": "revert",
+          "section": "🗑 Reverts"
+        },
+        {
+          "type": "hrevert",
+          "section": "🤫 Reverts",
+          "hidden": false
+        },
+        {
+          "type": "docs",
+          "section": "📚 Documentation",
+          "hidden": true
+        },
+        {
+          "type": "style",
+          "section": "💎 Styles",
+          "hidden": true
+        },
+        {
+          "type": "chore",
+          "section": "♻️ Miscellaneous Chores",
+          "hidden": true
+        },
+        {
+          "type": "refactor",
+          "section": "📦 Code Refactoring",
+          "hidden": true
+        },
+        {
+          "type": "test",
+          "section": "🚨 Tests",
+          "hidden": true
+        },
+        {
+          "type": "build",
+          "section": "🛠 Build System",
+          "hidden": true
+        },
+        {
+          "type": "ci",
+          "section": "⚙️ Continuous Integration",
+          "hidden": true
+        }
+      ]
+    }
+  }
+}

.github/workflows/release.backport.yml

@@ -11,9 +11,9 @@ jobs:
       pull-requests: write
     steps:
       - name: Release
-        uses: googleapis/release-please-action@v3
+        uses: googleapis/release-please-action@v4
         with:
           release-type: python
-          versioning-strategy: always-bump-patch
-          default-branch: ${{ github.ref_name }} 
+          target-branch: ${{ github.ref_name }} 
           token: ${{ secrets.GH_RELEASE_PAT }}
+          manifest-file: .release-please-manifest.backport.json

.github/workflows/release.main.yml

@@ -1,5 +1,7 @@
 name: Release Main
 on:
+  pull_request:
+    branches: [ "main" ]
   push:
     branches:
       - main
@@ -11,9 +13,10 @@ jobs:
       pull-requests: write
     steps:
       - name: Release
-        uses: googleapis/release-please-action@v3
+        uses: googleapis/release-please-action@v4
         with:
           release-type: python
-          versioning-strategy: always-bump-minor
-          default-branch: ${{ github.ref_name }} 
+          target-branch: fix/release-please-sections
           token: ${{ secrets.GH_RELEASE_PAT }}
+          config-file: .github/release-please-config.json
+          manifest-file: .github/.release-please-manifest.main.json