chore: Update dependabot.yml (#1814)

* chore: Update dependabot.yml
Source-Link: googleapis/synthtool@9ad18b6
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-java:latest@sha256:c33bd13e1eab022b0499a3afbfb4b93ae10cb8ad89d8203a6343a88b1b78400f

Author: gcf-owl-bot[bot]

.github/.OwlBot.lock.yaml

@@ -13,5 +13,5 @@
 # limitations under the License.
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-java:latest
-  digest: sha256:af2eda87a54601ae7b7b2be5055c17b43ac98a7805b586772db314de8a7d4a1d
-# created: 2023-06-16T02:10:09.149325782Z
+  digest: sha256:c33bd13e1eab022b0499a3afbfb4b93ae10cb8ad89d8203a6343a88b1b78400f
+# created: 2023-06-21T18:48:32.287298785Z

.github/dependabot.yml

@@ -6,12 +6,14 @@ updates:
       interval: "daily"
     # Disable version updates for Maven dependencies
     # we use renovate-bot as well as shared-dependencies BOM to update maven dependencies.
-    ignore: "*"
+    ignore:
+      - dependency-name: "*"
   - package-ecosystem: "pip"
     directory: "/"
     schedule:
       interval: "daily"
     # Disable version updates for pip dependencies
     # If a security vulnerability comes in, we will be notified about 
     # it via template in the synthtool repository.
-    ignore: "*"
+    ignore:
+      - dependency-name: "*"