Merge pull request #2057 from tweag/cg/fix_status_badge

chore: schedule daily CI run and add status badge tied to daily CI run

Author: mergify[bot]

.github/workflows/workflow.yaml

@@ -5,6 +5,8 @@ on:
   pull_request:
     branches: master
   workflow_dispatch: # allows manual triggering
+  schedule:
+    - cron: '1 11 * * *'
 env:
   # Bump this number to invalidate the GH actions cache
   cache-version: 0

README.md

@@ -2,7 +2,7 @@
 
 # Haskell rules for [Bazel][bazel]
 
-[![Continuous integration](https://github.com/tweag/rules_haskell/workflows/Continuous%20integration/badge.svg)](https://github.com/tweag/rules_haskell/actions?query=branch%3Amaster)
+[![Continuous Integration](https://github.com/tweag/rules_haskell/actions/workflows/workflow.yaml/badge.svg?event=schedule)](https://github.com/tweag/rules_haskell/actions/workflows/workflow.yaml)
 
 Bazel CI: [![Build status](https://badge.buildkite.com/1de3270f1df070a99978adb6efa180d0c32eac58e0fd1938d1.svg?branch=master)](https://buildkite.com/bazel/rules-haskell-haskell)