📖Docs: Update README.md with new use cases (#227)

## Description

This pull request updates the workflow configuration in the `README.md`
to enhance automation and permissions, and to use the latest workflow
version. The most important changes are:

**Workflow triggers and scheduling:**
* Added `workflow_dispatch` and a nightly scheduled run (`cron: '0 0 * *
*'`) to allow manual and automated executions of the workflow.

**Permissions:**
* Expanded required permissions to include `statuses`, `pages`, and
`id-token` in addition to `contents` and `pull-requests`.

**Workflow version:**
* Updated the referenced workflow from version `v2` to `v5` for the
`Process-PSModule` job.

Author: MariusStorhaug

README.md

@@ -79,6 +79,9 @@ To use the workflow, create a new file in the `.github/workflows` directory of t
 name: Process-PSModule
 
 on:
+  workflow_dispatch:
+  schedule:
+    - cron: '0 0 * * *'
   pull_request:
     branches:
       - main
@@ -96,10 +99,13 @@ concurrency:
 permissions:
   contents: write
   pull-requests: write
+  statuses: write
+  pages: write
+  id-token: write
 
 jobs:
   Process-PSModule:
-    uses: PSModule/Process-PSModule/.github/workflows/workflow.yml@v2
+    uses: PSModule/Process-PSModule/.github/workflows/workflow.yml@v5
     secrets:
       APIKEY: ${{ secrets.APIKEY }}