chore(testio): add entry in README.md

README.md

@@ -290,6 +290,35 @@ jobs:
 ```
 </details>
 
+### TestIO
+
+<details>
+
+<summary>This GitHub Action can be used to trigger a test on the external crowd-testing platform TestIO from a pull request.</summary>
+
+```yml
+name: TestIO - Trigger test from PR
+on:
+  issue_comment:
+    types: [created, edited]
+
+jobs:
+  trigger-testio-test:
+    uses: Staffbase/gha-workflows/.github/workflows/template_testio_trigger_test.yml@v2.3.0
+    with:
+      # optional: the slug you received from TestIO, defaults to 'staffbase'
+      testio-slug: your TestIO slug
+      # required: ID of the product on the TestIO platform to which the triggered test should be assigned to
+      testio-product-id: your product ID
+    secrets:
+      # required: GitHub token to be used for commenting in a PR
+      github-token: ${{ secrets.GITHUB_TOKEN }}
+      # required: TestIO token of a user for which the triggered test is created 
+      testio-token: ${{ secrets.TESTIO_TOKEN }}
+```
+
+</details>
+
 ### Yamllint
 
 <details>