chore: allow forks with synchronize event (#84)

Signed-off-by: Michele Dolfi <[email protected]>

.github/workflows/ci.yml

@@ -5,7 +5,7 @@ on:
     # Nightly build at 3:42 A.M.
     - cron: "42 3 */1 * *"
   pull_request:
-    types: [opened, reopened]
+    types: [opened, reopened, synchronize]
   push:
     branches:
       - "**"
@@ -18,8 +18,11 @@ env:
 
 jobs:
   code-checks:
+    if: ${{ github.event_name == 'push' || (github.event.pull_request.head.repo.full_name != 'DS4SD/deepsearch-glm' && github.event.pull_request.head.repo.full_name != 'ds4sd/deepsearch-glm') }}
     uses: ./.github/workflows/checks.yml
   build-wheels:
+    if: ${{ github.event_name == 'push' || (github.event.pull_request.head.repo.full_name != 'DS4SD/deepsearch-glm' && github.event.pull_request.head.repo.full_name != 'ds4sd/deepsearch-glm') }}
     uses: ./.github/workflows/wheels.yml
   rhel-build:
+    if: ${{ github.event_name == 'push' || (github.event.pull_request.head.repo.full_name != 'DS4SD/deepsearch-glm' && github.event.pull_request.head.repo.full_name != 'ds4sd/deepsearch-glm') }}
     uses: ./.github/workflows/rhel.yml