fix(renovate): use changelogUrl instead of deprecated sourceUrl (#2485)

* chore(renovate): optimize dependency update strategy

Add rate limiting, grouping, and minimum release age to reduce PR volume while maintaining weekly updates. Groups related packages (electron, react, testing, build tools) to batch dependency updates.

* fix(renovate): make npm-non-major a catch-all for ungrouped packages

* fix(renovate): use changelogUrl instead of deprecated sourceUrl

Author: afonsojramos