Update dependabot configuration.

Author: fabiocaccamo

.github/dependabot.yml

@@ -5,18 +5,16 @@ updates:
     directory: "/"
     schedule:
       interval: "monthly"
-    open-pull-requests-limit: 100
     groups:
-      all-dependencies:
+      all-requirements:
         patterns:
           - "*"
 
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:
       interval: "monthly"
-    open-pull-requests-limit: 100
     groups:
-      all-dependencies:
+      all-github-actions:
         patterns:
           - "*"