Update changelog for GH actions

.github/workflows/update-changelog.yaml

@@ -0,0 +1,33 @@
+# This workflow takes the GitHub release notes an updates the changelog on the
+# main branch with the body of the release notes, thereby keeping a log in
+# the git repo of the changes.
+
+name: "Update Changelog"
+
+on:
+  release:
+    types: [released]
+
+jobs:
+  update:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+        with:
+          ref: main
+
+      - name: Update Changelog
+        uses: stefanzweifel/changelog-updater-action@v1
+        with:
+          release-notes: ${{ github.event.release.body }}
+          latest-version: ${{ github.event.release.name }}
+          path-to-changelog: CHANGES.md
+
+      - name: Commit updated CHANGELOG
+        uses: stefanzweifel/git-auto-commit-action@v4
+        with:
+          branch: main
+          commit_message: Update CHANGELOG
+          file_pattern: CHANGES.md

CHANGELOG.md

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+# Sphinx_Changelog v1.2.0 (2022-08-31)
+
+This release requires towncrier 22.8.0
+
+* docs: Fix typo in level by @jmartens in https://github.com/OpenAstronomy/sphinx-changelog/pull/13
+* Fix for removed `top_line` argument in towncrier renderer by @ConorMacBride in https://github.com/OpenAstronomy/sphinx-changelog/pull/14
+
+## New Contributors
+* @jmartens made their first contribution in https://github.com/OpenAstronomy/sphinx-changelog/pull/13
+* @ConorMacBride made their first contribution in https://github.com/OpenAstronomy/sphinx-changelog/pull/14
+
+**Full Changelog**: https://github.com/OpenAstronomy/sphinx-changelog/compare/v1.1.2...v1.2.0
+
+# Sphinx_Changelog v1.1.2 (2021-08-19)
+
+## Bug Fixes
+
+-   Explicitly specify encoding when writing changelog.
+    ([\#11](https://github.com/OpenAstronomy/sphinx-changelog/pull/11))
+-   Fixed rendering to match towncrier, which means that top_line should
+    not be included in the template.
+    ([\#12](https://github.com/OpenAstronomy/sphinx-changelog/pull/12))
+
+# Sphinx_Changelog v1.1.1 (2021-05-14)
+
+## Bug Fixes
+
+-   Re-implement the `:towncrier-skip-if-empty:` flag as it was dropped
+    in the upgrade to 21.3.
+    ([\#10](https://github.com/OpenAstronomy/sphinx-changelog/pull/10))
+
+# Sphinx_Changelog v1.1.0 (2021-05-11)
+
+No significant changes.
+
+# Sphinx_Changelog 1.1.0rc1 (2021-05-11)
+
+## Features
+
+-   Update to support only the latest release of towncrier as there were
+    some substantial changes.
+    ([\#9](https://github.com/OpenAstronomy/sphinx-changelog/pull/9))
+-   Added support for controlling the title underline used by towncrier
+    in the changelog directive.
+    ([\#9](https://github.com/OpenAstronomy/sphinx-changelog/pull/9))
+
+# Sphinx_Changelog v1.0.0 (2021-03-16)
+
+No significant changes.
+
+# Sphinx_Changelog v0.1rc5 (2021-03-03)
+
+## Bug Fixes
+
+-   Do not raise exceptions inside the directive as this can cause the
+    sphinx parallel build to fail.
+    ([\#8](https://github.com/OpenAstronomy/sphinx-changelog/pull/8))
+
+# Sphinx_Changelog v0.1rc4 (2021-03-02)
+
+## Features
+
+-   Add a flag to skip running towncrier if no fragment files are found.
+    ([\#6](https://github.com/OpenAstronomy/sphinx-changelog/pull/6))
+
+## Bug Fixes
+
+-   Fix resolving paths relative to the file containing the changelog
+    directive.
+    ([\#6](https://github.com/OpenAstronomy/sphinx-changelog/pull/6))
+
+# Sphinx_Changelog v0.1rc3 (2021-03-02)
+
+## Bug Fixes
+
+-   Raise a more helpful error if no towncrier config can be found.
+    ([\#5](https://github.com/OpenAstronomy/sphinx-changelog/pull/5))
+
+# Sphinx_Changelog v0.1rc2 (2021-03-01)
+
+## Features
+
+-   Implement options for changelog backend. Including the existing
+    changelog and towncrier are currently available.
+    ([\#1](https://github.com/OpenAstronomy/sphinx-changelog/pull/1))
+
+## Bug Fixes
+
+-   Fix use of template and update to parsing code from a newer
+    towncrier version
+    ([\#3](https://github.com/OpenAstronomy/sphinx-changelog/pull/3))
+
+# Sphinx_Changelog v0.1rc1 (2021-03-01)
+
+Initial implementation copied from [sunpy](https://sunpy.org).