Test if release candidate SVN secrets are set correctly

For only the daffodil-vscode repo, testing the release candidate action
fails with the error:

  Input required and not supplied: svn_username

The same configuration works with other repots, and other secrets work
correctly in this repo. To help debug this, temporarily add a new step
to the release candidate action that determines if the svn secrets are
set or not.

This commit will be reverted once we determine if secret is missing or
empty.

Author: stevedlawrence

.github/workflows/release-candidate.yml

@@ -37,6 +37,20 @@ jobs:
       - name: Checkout Repository
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
+      - name: Check if SVN secrets are set
+        run: |
+          if [ -z "${{ secrets.DAFFODIL_SVN_DEV_USERNAME }}" ]; then
+            echo "DAFFODIL_SVN_DEV_USERNAME is not set"
+          else
+            echo "DAFFODIL_SVN_DEV_USERNAME is set"
+          fi
+
+          if [ -z "${{ secrets.DAFFODIL_SVN_DEV_PASSWORD }}" ]; then
+            echo "DAFFODIL_SVN_DEV_PASSWORD is not set"
+          else
+            echo "DAFFODIL_SVN_DEV_PASSWORD is set"
+          fi
+
       - name: ASF Release Candidate
         id: rc
         uses: apache/daffodil-infrastructure/actions/release-candidate@main