chore(dependabot): fix ignore patterns (exact names, no wildcard) + checkout v7

- dependabot ignore for npm does NOT support wildcards (only groups.patterns
  does). The '@tsparticles/*' rule was silently ignored -> v4 bumps kept
  landing. Replace with exact scoped names.
- bump actions/checkout v5->v7 (closes dependabot PR #5); the CI failure on
  that PR was a stale-branch format-check, not checkout v7.
Open @tsparticles PRs now closed (#9 already closed earlier).

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v7
 
       - name: Set up Bun
         uses: oven-sh/setup-bun@v2