Configure dependabot to ignore ruff updates (RustPython#6185)

* Make dependabot ignore ruff updates

* Regenrate Cargo.lock

* Fix clippy

* Fix typo

Author: ShaharNaveh

.github/dependabot.yml

@@ -4,6 +4,11 @@ updates:
     directory: /
     schedule:
       interval: weekly
+    ignore:
+      # TODO: Remove when we use ruff from crates.io
+      # for some reason dependabot only updates the Cargo.lock file when dealing
+      # with git dependencies. i.e. not updating the version in Cargo.toml
+      - dependency-name: "ruff_*" 
   - package-ecosystem: github-actions
     directory: /
     schedule: