Fix release markdown rendering of double newlines

[glensc]

Originally posted to laminas/automatic-releases#176

Because there's a double newline between two lists, markdown renders every item with double newlines and considers the two lists as one.

The workaround is to put some non-list element(s) between the lists.

Current behavior

markdown source

### Release Notes for [0.19.1](https://github.com/perftools/xhgui/milestone/19)

0.19.x bugfix release (patch)

### 0.19.1

- Total issues resolved: **0**
- Total pull requests resolved: **4**
- Total contributors: **2**

 - [442: Cleanup:  Remove adding ext-phar for build in Dockerfile](https://github.com/perftools/xhgui/pull/442) thanks to @glensc
 - [441: Set GIT_AUTHOR_NAME/GIT_AUTHOR_EMAIL via env rather secrets](https://github.com/perftools/xhgui/pull/441) thanks to @glensc
 - [438: Feature: Add driver name to PdoRepository](https://github.com/perftools/xhgui/pull/438) thanks to @glensc
 - [436: Implement pdo: getForUrl(), getPercentileForUrl(), getAll()](https://github.com/perftools/xhgui/pull/436) thanks to @fengqi

Expected behavior

markdown source

### Release Notes for [0.19.1](https://github.com/perftools/xhgui/milestone/19)

0.19.x bugfix release (patch)

### 0.19.1

Summary:
- Total issues resolved: **0**
- Total pull requests resolved: **4**
- Total contributors: **2**

Pull requests:
 - [442: Cleanup:  Remove adding ext-phar for build in Dockerfile](https://github.com/perftools/xhgui/pull/442) thanks to @glensc
 - [441: Set GIT_AUTHOR_NAME/GIT_AUTHOR_EMAIL via env rather secrets](https://github.com/perftools/xhgui/pull/441) thanks to @glensc
 - [438: Feature: Add driver name to PdoRepository](https://github.com/perftools/xhgui/pull/438) thanks to @glensc
 - [436: Implement pdo: getForUrl(), getPercentileForUrl(), getAll()](https://github.com/perftools/xhgui/pull/436) thanks to @fengqi

[WyriHaximus]

Interesting, and I assume this only happens because you don't group by labels 🤔 . Let me see, this should be fairly easy to fix.

[glensc]

yeah, I don't have any labels in the project

i was thinking if you out of ideas what to put between lists, perhaps a <hr> aka ---- or some   trickery

[WyriHaximus]

Could be, but I also like the Pull requests as a seperator. it also turned out to be a bit trickier to do then I thought. But will continue tonight

[WyriHaximus]

@glensc How would #71 work for you? You'd had to set an extra flag, but that will group everything not matched by (other) labels under the one you specify by the flag.

[glensc]

@WyriHaximus once it's merged and released I have to motivate laminas guys. so if it's enabled by default it would be easier for me :D

[WyriHaximus]

@glensc The only issue with enabling it by default is that would be a backward compatibility break, and that I don't have a good default word.

[WyriHaximus]

@glensc Jumped into that issue, let's see :)

[glensc]

Created laminas/automatic-releases#177. the text will appear before the pr/issue list?

[WyriHaximus]

It is treated like any other label.