Checkout protostream branch so that the PR milestone can be calculated

.github/workflows/dependabot_pull_request.yml

@@ -18,11 +18,15 @@ jobs:
       contents: write
       pull-requests: write
     steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
       - name: Checkout repository
         uses: actions/checkout@v4
         with:
           ref: main
           repository: infinispan/infinispan
+          path: infinispan
 
       # Explicitly set the default repository as it will be infinispan/infinispan due to the previous checkout step
       - run: |
@@ -38,7 +42,7 @@ jobs:
 
       - name: Create or Update Existing Jira
         run: |
-          source ./bin/jira/upsert.sh
+          source ./infinispan/bin/jira/upsert.sh
           echo "JIRA_ISSUE_KEY=${JIRA_ISSUE_KEY}" >> $GITHUB_ENV
           echo "JIRA_ISSUE_URL=${JIRA_ISSUE_URL}" >> $GITHUB_ENV
         env:
@@ -73,7 +77,7 @@ jobs:
           sudo apt-get install xmlstarlet
           MVN_VERSION=$(xmlstarlet sel -t -m _:project -v _:version pom.xml)
           export MAJOR_MINOR_VERSION=${MVN_VERSION%.*}
-          gh pr edit ${{ github.event.pull_request.number }} --milestone "$(./bin/jira/get_milestone.sh)"
+          gh pr edit ${{ github.event.pull_request.number }} --milestone "$(./infinispan/bin/jira/get_milestone.sh)"
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           PROJECT_KEY: ISPN