ci: Fix sleep duration

Silly me, it's seconds by default. Turn into 45 minutes.

Fixes: c82495e ("ci: Fix commit message for update-dp workflow, add delay")
Signed-off-by: Quentin Monnet <qmo@qmon.net>

Author: qmonnet

.github/workflows/update-dp.yml

@@ -47,7 +47,7 @@ jobs:
 
       - name: "Give time for new packages to be published"
         run: |
-          sleep 45
+          sleep 45m
 
       - name: "Generate GitHub App token for the dataplane repository"
         id: "app-token"