[chore] Add repository check to tidy-dependencies workflow (#45219)

Adds a repository origin check to the tidy-dependencies.yml workflow
condition to ensure it only runs on PRs from the main repository.

Author: dmitryax

.github/workflows/tidy-dependencies.yml

@@ -19,7 +19,7 @@ jobs:
       contents: write # required for pushing changes
     timeout-minutes: 30
     runs-on: ubuntu-24.04
-    if: ${{ !contains(github.event.pull_request.labels.*.name, 'dependency-major-update') && (github.actor == 'renovate[bot]' || contains(github.event.pull_request.labels.*.name, 'renovatebot')) }}
+    if: ${{ !contains(github.event.pull_request.labels.*.name, 'dependency-major-update') && (github.actor == 'renovate[bot]' || contains(github.event.pull_request.labels.*.name, 'renovatebot')) && github.event.pull_request.head.repo.fork == false }}
     steps:
       - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
         with: