Merge pull request #2000 from matthewdale/godriver3445-submod-workflow

GODRIVER-3445 Update specifications submodule weekly with dependabot.

Author: matthewdale

.github/dependabot.yml

@@ -11,4 +11,8 @@ updates:
   - package-ecosystem: gomod
     directory: /
     schedule:
-      interval: "weekly"
+      interval: "weekly"
+  - package-ecosystem: "gitsubmodule"
+    directory: "/"
+    schedule:
+      interval: "weekly"