Merge pull request #200 from SpiNNakerManchester/permissions

Permissions tests

Author: rowleya

.github/workflows/self_hosted.yml

@@ -16,6 +16,9 @@
 # For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
 
 name: Self Hosted Tests
+permissions:
+  contents: read
+  pull-requests: write
 
 on:
   push: