Update dependabot.yml to include ITs

[skip ci]

Signed-off-by: Ashley <73482956+ascopes@users.noreply.github.com>

Author: ascopes

.github/dependabot.yml

@@ -28,3 +28,17 @@ updates:
       - ascopes
     labels:
       - maven
+  - package-ecosystem: maven
+    directory: '/java-compiler-testing/src/it/*'
+    open-pull-requests-limit: 99
+    rebase-strategy: auto
+    schedule:
+      interval: weekly
+      day: monday
+      time: "06:00"
+      timezone: Europe/London
+    target-branch: main
+    assignees:
+      - ascopes
+    labels:
+      - maven