Remove merge-dependabot workflow (#311)

* Remove `merge-dependabot` workflow

In this repository, we don't need changelog entries. I would therefore propose to disable the `merge-dependabot` workflow and merge upgrades manually.

* Run Dependabot weekly

Author: ppkarwasz

.github/dependabot.yaml

@@ -30,21 +30,31 @@ updates:
       - "/"
       - "log4j-samples-graalvm"
     schedule:
-      interval: daily
-    open-pull-requests-limit: 10
+      interval: weekly
+    groups:
+      all:
+        patterns:
+          - "*"
     registries:
       - maven-central
 
   - package-ecosystem: gradle
     directories:
       - "/"
     schedule:
-      interval: daily
-    open-pull-requests-limit: 10
+      interval: weekly
+    groups:
+      all:
+        patterns:
+          - "*"
     registries:
       - maven-central
 
   - package-ecosystem: github-actions
     directory: "/"
     schedule:
       interval: weekly
+    groups:
+      all:
+        patterns:
+          - "*"

.github/workflows/build.yaml

@@ -36,5 +36,4 @@ permissions: read-all
 jobs:
 
   integration-test:
-    if: github.actor != 'dependabot[bot]'
     uses: apache/logging-log4j-samples/.github/workflows/integration-test.yaml@main