Fix formatting in RELEASING.rst

Author: nicoddemus

RELEASING.rst

@@ -3,10 +3,8 @@ Here are the steps on how to make a new release.
 1. Create a ``release-VERSION`` branch from ``upstream/main``.
 2. Update ``CHANGELOG.rst``.
 3. Push the branch to ``upstream``.
-4. Once all tests pass, start the ``deploy`` workflow manually or via:
+4. Once all tests pass, start the ``deploy`` workflow manually or via::
 
-   ```
-   gh workflow run deploy.yml --repo pytest-dev/pytest-mock --ref release-VERSION -f version=VERSION
-   ```
+    gh workflow run deploy.yml --repo pytest-dev/pytest-mock --ref release-VERSION -f version=VERSION
 
 5. Merge the PR.