feat(dependabot): revert versioning-strategy set to widen (#3478)

This is an invalid configuration parameter and does not work. Let's revert it.

Reverts #3434.

Author: thomaseizinger

.github/dependabot.yml

@@ -8,7 +8,6 @@ updates:
     commit-message:
       prefix: "deps"
     rebase-strategy: "disabled"
-    versioning-strategy: "widen"
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule: