Update Dependabot checks (#471)

* Only check for minor updates

* Update Dependabot schedule to run on Thursdays instead of Mondays

Author: thgaskell

.github/dependabot.yml

@@ -17,4 +17,8 @@ updates:
       - "/examples/server-sync"
       - "/examples/simple-table"
     schedule:
-      interval: "weekly"
+      interval: "weekly"
+      day: "thursday"
+    ignore:
+      - dependency-name: "*"
+        update-types: ["version-update:semver-major" , "version-update:semver-patch"]