Create Dependabot config file (#1743)

* Create Dependabot config file

* Update greetings.yml

* Update greetings.yml

* Update dependabot.yml

* Update dependabot.yml

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>
Co-authored-by: Glenn Jocher <glenn.jocher@ultralytics.com>

.github/dependabot.yml

@@ -0,0 +1,12 @@
+version: 2
+updates:
+- package-ecosystem: pip
+  directory: "/"
+  schedule:
+    interval: weekly
+    time: "04:00"
+  open-pull-requests-limit: 10
+  reviewers:
+  - glenn-jocher
+  labels:
+  - dependencies