ci: improve release notes format checking (#8984)

* chore: fix invalid release note

* try improving relnote linting

* add relnotes path

* fix bad release note

* improve reno config

Author: anakin87

.github/workflows/release_notes.yml

@@ -13,6 +13,7 @@ on:
       - "**.py"
       - "pyproject.toml"
       - "!.github/**/*.py"
+      - "releasenotes/notes/*.yaml"
 
 jobs:
   reno:
@@ -45,4 +46,5 @@ jobs:
       - name: Verify release notes formatting
         if: steps.changed-files.outputs.any_changed == 'true' && !contains( github.event.pull_request.labels.*.name, 'ignore-for-release-notes')
         run: |
-          yamllint -d "{extends: default, rules: {line-length: {max: 1200}}}" ${{ steps.changed-files.outputs.all_changed_files }}
+          pip install "reno<5"
+          reno lint .  # it is not possible to pass a list of files to reno lint

.github/workflows/release_notes_skipper.yml

@@ -13,6 +13,7 @@ on:
       - "**.py"
       - "pyproject.toml"
       - "!.github/**/*.py"
+      - "releasenotes/notes/*.yaml"
 
 jobs:
   reno:

releasenotes/config.yaml

@@ -37,11 +37,14 @@ template: |
       Add normal bug fixes here, or remove this section.
 
 sections:
-  # The prelude section is implicitly included.
+  # The highlights section is implicitly included.
   - [upgrade, Upgrade Notes]
   - [features, New Features]
   - [enhancements, Enhancement Notes]
   - [issues, Known Issues]
   - [deprecations, Deprecation Notes]
   - [security, Security Notes]
   - [fixes, Bug Fixes]
+  # DO NOT REMOVE. The following sections are no longer used, but were used in the past. Keeping them here avoids reno linting errors.
+  - [prelude, prelude]
+  - [preview, preview]

releasenotes/notes/add-batch_size_faiss_init-5e97c1fb9409f873.yaml

@@ -1,5 +1,5 @@
 ---
 enhancements:
   - |
-  Add batch_size to the __init__ method of FAISS Document Store. This works as the default value for all methods of
-  FAISS Document Store that support batch_size.
+    Add batch_size to the __init__ method of FAISS Document Store. This works as the default value for all methods of
+    FAISS Document Store that support batch_size.

releasenotes/notes/run-async-azure-54450f0c2495f5c8.yaml

@@ -1,5 +1,4 @@
 ---
----
 features:
   - |
     Add `run_async` method to `AzureOpenAIChatGenerator`. This method uses `AsyncAzureOpenAI`