Fix specification builds (#281)

Since the last release the GitHub Actions environment has changed such
that we now must explicitly grant permissions to actions in order to
make a release.

Signed-off-by: Joshua Lock <joshua.lock@uk.verizon.com>

Author: joshuagl

.github/workflows/release.yml

@@ -8,6 +8,8 @@ jobs:
   make-release:
     name: Make and publish spec release
     runs-on: ubuntu-latest
+    permissions:
+      contents: write # required to publish (tag) a release 
     steps:
     - name: Clone main
       uses: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab