Raise dependabot open-pull-requests-limit to 10

The default is 5. Bumping the cap leaves headroom when several
github-actions updates land in the same weekly window, and editing
this manifest also forces Dependabot to re-evaluate the configuration
on the default branch.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: yahonda

.github/dependabot.yml

@@ -5,3 +5,4 @@ updates:
     directory: "/"
     schedule:
       interval: "weekly"
+    open-pull-requests-limit: 10