Add Bazel and GitHub Actions to Dependabot config

Signed-off-by: Andrew Mikhail <andrewmikhail@ymail.com>

Author: amikhail48

.github/dependabot.yml

@@ -0,0 +1,16 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file
+
+version: 2
+updates:
+ - package-ecosystem: "bazel"
+   directory: "/"
+   schedule:
+     interval: weekly
+
+ - package-ecosystem: "github-actions"
+   directory: "/"
+   schedule:
+     interval: weekly