ci(dependabot): switch schedule from weekly to daily (#300)

Weekly schedule with a specific day (Monday) can be unreliable —
GitHub does not guarantee exact execution times, and if the window
is missed, Dependabot may skip the week entirely.

Switching to daily checks ensures consistent weekday coverage. The
existing cooldown setting (default-days: 7) prevents duplicate PRs
for the same dependency within a week, so there is no increase in
PR noise.

Author: chorrell

.github/dependabot.yml

@@ -3,8 +3,7 @@ updates:
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:
-      interval: "weekly"
-      day: "monday"
+      interval: "daily"
       time: "09:30"
       timezone: "America/Toronto"
     pull-request-branch-name:
@@ -17,8 +16,7 @@ updates:
   - package-ecosystem: "pre-commit"
     directory: "/"
     schedule:
-      interval: "weekly"
-      day: "monday"
+      interval: "daily"
       time: "09:45"
       timezone: "America/Toronto"
     pull-request-branch-name: