Fix start date and rename variable

.github/workflows/matrix_dev_sync_reminder.yml

@@ -5,7 +5,7 @@ on:
   workflow_dispatch: # manual triggering
 
 env:
-  FIRST_RUN_DATE: "2024-11-13"
+  FIRST_SYNC_DATE: "2024-11-2"
 
 jobs:
   weekindex:
@@ -20,7 +20,7 @@ jobs:
         id: calculate
         run: |
           current_date=$(date +%Y-%m-%d)
-          start=$(date -d "${{ env.FIRST_RUN_DATE }}" +%s)
+          start=$(date -d "${{ env.FIRST_SYNC_DATE }}" +%s)
           end=$(date -d "$current_date" +%s)
           weekdiff=$(((end - start) / 60 / 60 / 24 / 7))
           weekindex=$((weekdiff % 2))
@@ -40,7 +40,7 @@ jobs:
           echo "next_next_bi_weekly_date=$next_next_bi_weekly_date" >> "$GITHUB_OUTPUT"
 
 
-          echo "FIRST_RUN_DATE: ${{ env.FIRST_RUN_DATE }}" >> $GITHUB_STEP_SUMMARY
+          echo "FIRST_SYNC_DATE: ${{ env.FIRST_SYNC_DATE }}" >> $GITHUB_STEP_SUMMARY
           echo "current_date: $current_date" >> $GITHUB_STEP_SUMMARY
           echo "weekdiff: $weekdiff" >> $GITHUB_STEP_SUMMARY
           echo "weekindex: $weekindex" >> $GITHUB_STEP_SUMMARY