Update Dependabot config so it checks dependencies for dev-bins, ci/xtask, and programs/sbf (#9007)

* Update dependabot config so it checks dependencies for programs/sbf

* Add dev-bins and ci/xtask to the dependabot directories list

.github/dependabot.yml

@@ -6,7 +6,11 @@
 version: 2
 updates:
   - package-ecosystem: cargo
-    directory: "/"
+    directories:
+      - "/"
+      - "/dev-bins"
+      - "/ci/xtask"
+      - "/programs/sbf"
     schedule:
       interval: daily
       time: "01:00"