Simplify Dependabot configuration by removing groups

Removed group patterns for dependencies in Dependabot configuration.

Author: NmurtasDev

.github/dependabot-update.yml

@@ -10,17 +10,3 @@ updates:
     schedule:
       interval: "weekly"
     open-pull-requests-limit: 10
-
-    groups:
-      spring:
-        patterns:
-          - "org.springframework.*"
-      testing:
-        patterns:
-          - "junit*"
-          - "org.mockito*"
-      logging:
-        patterns:
-          - "ch.qos.logback*"
-          - "org.slf4j*"
-