release: set test plan and release branch

Author: ladamesny

.github/workflows/staging.yml

@@ -60,7 +60,7 @@ jobs:
     - name: checkout code
       uses: actions/checkout@v4
       with:
-        ref: ${{ github.event_name == 'workflow_dispatch' && github.ref_name || 'v1.2.0' }}
+        ref: ${{ github.event_name == 'workflow_dispatch' && github.ref_name || 'release-v1.3.x' }}
 
     - name: Set deployment_version as env variable
       run: echo "DEPLOYMENT_VERSION=$(jq -r .deployment_version ./config/substrate/staging_nodes.json)" >> $GITHUB_ENV
@@ -72,7 +72,7 @@ jobs:
         elif [ ! -z "${{ inputs.execution }}" ]; then
           echo "TEST_EXECUTION=${{ inputs.execution }}" >> $GITHUB_ENV
         else
-          echo "TEST_PLAN=ETCM-8452" >> $GITHUB_ENV
+          echo "TEST_PLAN=ETCM-9105" >> $GITHUB_ENV
         fi
 
     - name: set report_to_xray env variable