Fix list formatting in v5.1.0 changelog

The list of changes was not indented enough, and so didn't actually get formatted as a list when rendering HTML, which left it pretty unreadable. This also adds a blank line between the last 4.x version and 5.0.0 to match the extra blank lines between other major versions.

docs/changelog.rst

@@ -8,21 +8,22 @@ For a full list of triaged issues, bugs and PRs and what release they are target
 All help in providing PRs to close out bug issues is appreciated. Even if that is providing a repo that fully replicates issues. We have very generous contributors that have added these to bug issues which meant another contributor picked up the bug and closed it out.
 
 -  5.1.0
-   - Use ruff for linting (instead of current flake8/isort/pyflakes) - thanks @jairhenrique
-   - Enable rule B (flake8-bugbear) on ruff - thanks @jairhenrique
-   - Configure read the docs V2 - thanks @jairhenrique
-   - Fix typo in docs - thanks @quasimik
-   - Make json.loads of Python >=3.6 decode bytes by itself - thanks @hartwork
-   - Fix body matcher for chunked requests (fixes #734) - thanks @hartwork
-   - Fix query param filter for aiohttp (fixes #517) - thanks @hartwork and @salomvary
-   - Remove unnecessary dependency on six. - thanks @charettes
-   - build(deps): update sphinx requirement from <7 to <8 - thanks @jairhenrique
-   - Add action to validate docs - thanks @jairhenrique
-   - Add editorconfig file - thanks @jairhenrique
-   - Drop iscoroutinefunction fallback function for unsupported python thanks @jairhenrique
+    - Use ruff for linting (instead of current flake8/isort/pyflakes) - thanks @jairhenrique
+    - Enable rule B (flake8-bugbear) on ruff - thanks @jairhenrique
+    - Configure read the docs V2 - thanks @jairhenrique
+    - Fix typo in docs - thanks @quasimik
+    - Make json.loads of Python >=3.6 decode bytes by itself - thanks @hartwork
+    - Fix body matcher for chunked requests (fixes #734) - thanks @hartwork
+    - Fix query param filter for aiohttp (fixes #517) - thanks @hartwork and @salomvary
+    - Remove unnecessary dependency on six. - thanks @charettes
+    - build(deps): update sphinx requirement from <7 to <8 - thanks @jairhenrique
+    - Add action to validate docs - thanks @jairhenrique
+    - Add editorconfig file - thanks @jairhenrique
+    - Drop iscoroutinefunction fallback function for unsupported python thanks @jairhenrique
 -  5.0.0
     - BREAKING CHANGE: Drop support for Python 3.7.  3.7 is EOL as of 6/27/23 Thanks @jairhenrique
     - BREAKING CHANGE: Custom Cassette persisters no longer catch ValueError.  If you have implemented a custom persister (has anyone implemented a custom persister?  Let us know!) then you will need to throw a CassetteNotFoundError when unable to find a cassette.  See #681 for discussion and reason for this change. Thanks @amosjyng for the PR and the review from @hartwork
+
 -  4.4.0
     - HUGE thanks to @hartwork for all the work done on this release!
     - Bring vcr/unittest in to vcrpy as a full feature of vcr instead of a separate library.  Big thanks to @hartwork for doing this and to @agriffis for originally creating the library