Merge 'master' (except snapcraft.yaml)

.github/dependabot.yml

@@ -0,0 +1,8 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"
+    commit-message:
+      prefix: "ci"

.github/workflows/update-readme.yaml

@@ -29,7 +29,7 @@ jobs:
 
       - uses: EndBug/add-and-commit@v9
         with:
-          message: "docs(readme): Bump sync date"
+          message: "bump timestamp"
           default_author: github_actions
 
   call-sync-repo:

README.md

@@ -21,6 +21,17 @@ sudo snap install nvim --edge --classic
 
 [![Get it from the Snap Store](https://snapcraft.io/static/images/badges/en/snap-store-black.svg)](https://snapcraft.io/nvim)
 
+## How this repo works
+
+1. This repo defines a time-triggered (daily) [GHA workflow](./.github/workflows/update-readme.yaml) on both its `master` and `nightly` branches.
+2. The workflow pushes a [timestamp commit](https://github.com/neovim/neovim-snap/commit/752cca5b7c2d8371f54825c61d0c8ebfedbf6711)
+   to "tickle" the external Snapcraft service.
+3. Snapcraft fetches the `master` or `nightly` branch of this repo and processes `snap/snapcraft.yaml`.
+4. Snapcraft builds Nvim (in its own, external service) as defined in `snap/snapcraft.yaml`.
+    - The `snap/snapcraft.yaml` in the `nightly` branch is [slightly different](https://github.com/neovim/neovim-snap/compare/master...nightly)
+      from the `master` branch. This is a limitation/requirement of Snapcraft's
+      design.
+
 ## Last Launchpad Sync
 
 <!-- BEGIN SYNC INFO -->