try

Author: ooooo-create

.github/workflows/preview-url-report.yml

@@ -19,6 +19,10 @@ jobs:
         with:
           fetch-depth: 0
 
+      - name: Fetch base branch
+        run: |
+          git fetch origin develop:develop
+
       - name: Generate comment body
         id: generate-comment
         run: |

ci_scripts/report_preview_url.sh

@@ -16,7 +16,7 @@ generate_preview_url() {
     echo "$final_url"
 }
 
-mapfile -t all_git_files < <(git diff --name-only --diff-filter=ACMR upstream/develop | sed 's#^docs/##')
+mapfile -t all_git_files < <(git diff --name-only --diff-filter=ACMR origin/develop | sed 's#^docs/##')
 
 output_lines=()