Group dependabot dependencies.

Author: fabiocaccamo

.github/dependabot.yml

@@ -5,10 +5,16 @@ updates:
     directory: "/"
     schedule:
       interval: "monthly"
-    open-pull-requests-limit: 100
+    groups:
+      python-requirements:
+        patterns:
+          - "*"
 
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:
       interval: "monthly"
-    open-pull-requests-limit: 100
+    groups:
+      github-actions:
+        patterns:
+          - "*"