fix: switch changelog preset from angular to conventionalcommits (#2226)

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## PR Checklist

- [x] Addresses an existing open issue: fixes #915
- [x] That issue was marked as [`status: accepting
prs`](https://github.com/JoshuaKGoldberg/create-typescript-app/issues?q=is%3Aopen+is%3Aissue+label%3A%22status%3A+accepting+prs%22)
- [x] Steps in
[CONTRIBUTING.md](https://github.com/JoshuaKGoldberg/create-typescript-app/blob/main/.github/CONTRIBUTING.md)
were taken

## Overview

Per
#915 (comment),
this doesn't clear existing CHANGELOG.md contents. I'll have to go
through impacted repositories and manually touch up their changelogs.

🎁

Author: JoshuaKGoldberg

.release-it.json

@@ -8,7 +8,7 @@
 	"plugins": {
 		"@release-it/conventional-changelog": {
 			"infile": "CHANGELOG.md",
-			"preset": "angular",
+			"preset": "conventionalcommits",
 			"types": [
 				{ "section": "Features", "type": "feat" },
 				{ "section": "Bug Fixes", "type": "fix" },