Dynamic charts repo ref

.github/workflows/continuous-deploy.yml

@@ -332,13 +332,33 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v4
 
+      - name: Determine branch
+        id: set_branch
+        uses: actions/github-script@v5
+        with:
+          script: |
+            const { GITHUB_TOKEN } = process.env;
+            const { context } = require('@actions/github');
+            const github = require('@actions/github').getOctokit(GITHUB_TOKEN);
+            const branch = 'standardise-roles';
+            try {
+              await github.rest.repos.getBranch({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                branch: branch,
+              });
+              return branch;
+            } catch (error) {
+              return 'master';
+            }
+
       - name: Checkout Charts
         uses: actions/checkout@v4
         with:
           repository: didx-xyz/charts
           token: ${{ secrets.PAT }}
           path: charts
-          ref: standardise-roles
+          ref: ${{ steps.set_branch.outputs.result }}
 
       - name: Install dependencies
         run: sudo apt-get install -y postgresql-client redis-tools