Add :nightly as an alias for :dev

Author: d7415

.github/workflows/cron.yml

@@ -170,4 +170,5 @@ jobs:
         run: |
           crane auth login -u ${{ secrets.DOCKERHUB_USERNAME }} -p ${{ secrets.DOCKERHUB_TOKEN }} index.docker.io
           crane tag lycheeorg/lychee:testing-${{ github.run_id }} dev
+          crane tag lycheeorg/lychee:testing-${{ github.run_id }} nightly
           crane cp lycheeorg/lychee:testing-${{ github.run_id }} lycheeorg/lychee-laravel:dev

README.md

@@ -32,7 +32,7 @@ The following tags are available :
 
 * `latest`: Latest Lychee release
 * `v[NUMBER]`: Stable version tag for a Lychee release
-* `dev`: Current master branch tag (Lychee operates on a stable master, so this should usually be safe)
+* `nightly` (also `dev`): Current master branch tag (Lychee operates on a stable master, so this should usually be safe)
 * `testing`: Tag for testing new branches and pull requests. Designed for internal use by LycheeOrg.
 
 ## Setup