Group vitest dependencies (#1167)

Author: HarelM

.github/dependabot.yml

@@ -11,6 +11,10 @@ updates:
       interval: "weekly"
     open-pull-requests-limit: 20
     versioning-strategy: increase
+    groups:
+      vitest:
+        patterns:
+          - "*vitest*"
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:
@@ -20,4 +24,4 @@ updates:
     schedule:
       interval: "weekly"
     open-pull-requests-limit: 5
-    versioning-strategy: increase
+    versioning-strategy: increase