CONTRIBUTING: add step to update UG config

CONTRIBUTING.md

@@ -1,3 +1,5 @@
+<!-- cSpell:ignore docsy userguide -->
+
 # How to Contribute
 
 We'd love to accept your patches and contributions to this project. There are
@@ -29,35 +31,37 @@ This project follows
 
 ## How to contribute
 
-See the [contribution
-guidelines](https://www.docsy.dev/docs/contribution-guidelines/)
-in the Docsy user guide.
+See the [contribution guidelines][] in the Docsy user guide.
 
 ## Publishing a release
 
 These notes are WIP for creating a release (v0.X.Y) from a local copy of the
 repo.
 
-1.  Change directory to your local Docsy repo and ensure that you're on a branch
-    and at the commit that you want to tag as the next release (usually
-    `@HEAD`).
+1.  Change directory to your local Docsy repo.
 2.  Ensure that the [CHANGELOG](CHANGELOG.md) has a release summary entry for
     v0.X.Y. If not, create one with a brief summary of breaking changes using
     the section template at the end of the file. (Note that change details are
     autogenerated by GitHub in a later step.)
-3.  Update the Hugo module versions to v0.X.Y.
-4.  Update the NPM package version in [package.json](package.json) to 0.X.Y.
+3.  Update module and package versions:
+    - Update the version of `docsy/dependencies` in [go.mod](go.mod) to v0.X.Y.
+    - Update the NPM package version in [package.json](package.json) to 0.X.Y.
+4.  Update the Docsy `version` in [userguide/config.toml][] to 0.X.Y.
 5.  Commit your changes, usually as a PR entitled "Release v0.X.Y preparation".
     Once the PR is approved and merged, proceed with the remaining steps.
-6.  Create the tags for v0.X.Y (we currently need two):
+6.  Ensure that you're:
+    - On the default branch
+    - At the commit that you want to tag as the next release (usually `@HEAD`).
+7.  Create the tags for v0.X.Y (we currently need two):
 
     ```sh
     REL=v0.X.Y
     git tag $REL
     git tag dependencies/$REL
     ```
 
-7.  Push the new tags to the main repo (which is named `upstream` in my setup):
+8.  Push the new tags to the main repo (which is named `upstream` in the
+    following setup):
 
     ```console
     $ git push upstream $REL && git push upstream dependencies/$REL
@@ -66,28 +70,30 @@ repo.
     * [new tag]         dependencies/v0.X.Y -> dependencies/v0.X.Y
     ```
 
-8.  Use the GitHub [Draft a new release][] feature, filling in the fields as
+9.  Use the GitHub [Draft a new release][] feature, filling in the fields as
     follows:
 
-    -   From the **release/tag dropdown**: Select the new release tag that you just
-        pushed, v0.X.Y.
-    -   Set the **release title** to the release number (without the "v").
-    -   Click "auto-generate release notes" to get the release details.
-    -   Replace the auto-generated "## What's Changed" heading by the following:
+    - From the **release/tag dropdown**: Select the new release tag that you
+      just pushed, v0.X.Y.
+    - Set the **release title** to the release number (without the "v").
+    - Click "auto-generate release notes" to get the release details.
+    - Replace the auto-generated "## What's Changed" heading by the following:
 
-        ```markdown
-        ## Release summary
+      ```markdown
+      ## Release summary
 
-        See, https://github.com/google/docsy/blob/main/CHANGELOG.md#0XY
+      See, https://github.com/google/docsy/blob/main/CHANGELOG.md#0XY
 
-        ## Commit details
-        ```
+      ## Commit details
+      ```
 
-    -   Replace the `0XY` anchor target above with a target appropriate for this
-        release.
-    -   Remove the "New contributors" autogenerated text (if present) since we
-        don't publish that as part of our release notes.
-    -   Select **Create a discussion for this release**.
-    -   Click **Publish release**.
+    - Replace the `0XY` anchor target above with a target appropriate for this
+      release.
+    - Remove the "New contributors" autogenerated text (if present) since we
+      don't publish that as part of our release notes.
+    - Select **Create a discussion for this release**.
+    - Click **Publish release**.
 
-[draft a new release]: https://github.com/google/docsy/releases/new
+[contribution guidelines]: https://www.docsy.dev/docs/contribution-guidelines/
+[Draft a new release]: https://github.com/google/docsy/releases/new
+[userguide/config.toml]: userguide/config.toml