chore(deps): group dependabot updates by ecosystem

Author: kYaRick

.github/dependabot.yml

@@ -7,7 +7,11 @@ updates:
       day: monday
       time: "06:00"
       timezone: Europe/Kyiv
-    open-pull-requests-limit: 5
+    open-pull-requests-limit: 1
+    groups:
+      nuget-all:
+        patterns:
+          - "*"
     labels:
       - "🧹 chore"
       - "📦 dependencies"
@@ -22,7 +26,11 @@ updates:
       day: monday
       time: "06:00"
       timezone: Europe/Kyiv
-    open-pull-requests-limit: 5
+    open-pull-requests-limit: 1
+    groups:
+      github-actions-all:
+        patterns:
+          - "*"
     labels:
       - "🧹 chore"
       - "🤖 ci"