Merge pull request #1001 from jacobbednarz/release-docs

Release docs

.changelog/1001.txt

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+```release-note:note
+docs: add release notes
+```

docs/release-process.md

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+## Release Process
+
+We aim to release on a fortnightly cadence, alternating weeks with the [terraform-provider-cloudflare](https://github.com/cloudflare/terraform-provider-cloudflare).
+
+This is to accommodate downstream tools and allow cahnges from this library to
+be used in the other systems without a month long delay.
+
+If a hotfix is needed, the same process outlined below is used however only the
+semantic versioning patch version is bumped.
+
+- Ensure CI is passing for [`master` branch](https://github.com/cloudflare/cloudflare-go/actions?query=branch%3Amaster).
+- Remove "(Unreleased)" portion from the header for the version you are intending
+  to release (here, 2.27.0). Create a new H2 above for the next unreleased
+  version (here 2.28.0). Example diff:
+
+  ```diff
+  + ## 2.28.0 (Unreleased)
+
+  + ## 2.27.0
+  - ## 2.27.0 (Unreleased)
+
+  NOTES:
+
+  * dependency: Update foo to v0.0.2 ([#1184](https://github.com/cloudflare/cloudflare-go/issues/123))
+  ```
+
+  Bumping the minor version is usually fine here unless you are intending on
+  releasing a major version bump.
+
+- Create a new GitHub release with the release title exactly matching the tag
+  (e.g. `v2.27.0`) and copy the entries from the CHANGELOG to the release notes.
+- A GitHub Action will now build the binaries, documentation and create the release.
+- Once this is completed, close off the milestone for the current release and
+  open the next that matches the CHANGELOG additions from earlier. Example: close
+  v2.27.0 but open a v2.28.0.