Add Dependabot groups

Author: case-fastly

.github/dependabot.yaml

@@ -5,9 +5,23 @@ updates:
     schedule:
       interval: weekly
     open-pull-requests-limit: 10
+    groups:
+      github-actions-minor-patch:
+        update-types:
+          - minor
+          - patch
 
   - package-ecosystem: gomod
     directory: "/"
     schedule:
       interval: weekly
     open-pull-requests-limit: 10
+    cooldown:
+      default-days: 14
+    groups:
+      golang-x:
+        patterns:
+          - "golang.org/x/*"
+      nbio:
+        patterns:
+          - "github.com/nbio/*"