chore(ci): scope dependabot prefixes so release-please skips non-runtime updates (#15)

Runtime deps -> fix(deps) (patch bump).
Dev deps     -> chore(deps-dev) (no bump).
GH Actions / reusable workflows -> chore(ci) (no bump).

Verified on openCoreEMR/release-please-test that release-please honors
these prefixes: only fix(deps) lands in the next release PR; chore(deps-dev)
and chore(ci) are excluded from version bumping.

Author: kojiromike

.github/dependabot.yml

@@ -1,12 +1,11 @@
 version: 2
 updates:
-- package-ecosystem: github-actions
-  directory: /
-  schedule:
-    interval: daily
-  labels:
-  - dependencies
-  - github-actions
-  commit-message:
-    prefix: deps
-    include: scope
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: daily
+    labels:
+      - dependencies
+      - github-actions
+    commit-message:
+      prefix: chore(ci)