dependabot: Update GHA dependencies in groups

This should reduce the number of PRs we have when there are many
updates to GHA deps, not just for go.mod deps.

Signed-off-by: Charlie Egan <charlie@styra.com>

.github/dependabot.yml

@@ -1,17 +1,21 @@
 version: 2
 updates:
-  - package-ecosystem: "github-actions"
-    directory: "/"
-    schedule:
-      interval: "weekly"
-  - package-ecosystem: "gomod"
-    directory: "/"
-    schedule:
-      interval: "monthly"
-    ignore:
-      # update OPA manually to bump version in README too
-      - dependency-name: "github.com/open-policy-agent/opa"
-    groups:
-      dependencies:
-        patterns:
-          - "*"
+- package-ecosystem: "github-actions"
+  directory: "/"
+  schedule:
+    interval: "weekly"
+  groups:
+    dependencies:
+      patterns:
+      - "*"
+- package-ecosystem: "gomod"
+  directory: "/"
+  schedule:
+    interval: "monthly"
+  ignore:
+  # update OPA manually to bump version in README too
+  - dependency-name: "github.com/open-policy-agent/opa"
+  groups:
+    dependencies:
+      patterns:
+      - "*"