feat: add dependabot config for keeping python packages updated

.github/dependabot.yml

@@ -0,0 +1,11 @@
+version: 2
+updates:
+- package-ecosystem: pip
+  directory: "/backend"
+  schedule:
+    interval: daily
+    time: "13:00"
+  groups:
+    python-packages:
+      patterns:
+        - "*"