Document release flow in README.md

Author: manzt

README.md

@@ -89,3 +89,12 @@ left column and its corresponding action in the right column. The formatting is
 clean and easy to read.
 
 Our CI enforces formatting, linting, and tests.
+
+## Release
+
+```bash
+git checkout main && git pull
+git commit -m "v[major].[minor].[patch]"
+git tag -a v[major].[minor].[patch] -m "v[major].[minor].[patch]"
+git push --follow-tags
+```