.github: Add uv to dependabot configuration

Let dependebot check for Python updates on a monthly basis.

Signed-off-by: Pieter De Gendt <[email protected]>

Author: pdgendt

.github/dependabot.yml

@@ -11,3 +11,15 @@ updates:
       actions-deps:
         patterns:
           - "*"
+
+  - package-ecosystem: "uv"
+    directory: "/"
+    schedule:
+      interval: "monthly"
+    commit-message:
+      prefix: "uv: "
+    labels: []
+    groups:
+      python-deps:
+        patterns:
+          - "*"