fix documentation action syntax error

Author: EthanJamesLew

.github/workflows/documentation.yml

@@ -2,7 +2,7 @@ name: Sphinx Build
 on: [push, pull_request, workflow_dispatch]
 jobs:
   docs:
-    if: {{ github.ref == 'refs/heads/develop' ||  github.ref == 'refs/heads/main' ||  startsWith(github.ref, 'refs/tags') }}
+    if: github.ref == 'refs/heads/develop' ||  github.ref == 'refs/heads/main' ||  startsWith(github.ref, 'refs/tags')
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2