JuliaDiff/ChainRules.jl: v1.73.0

ChainRules v1.73.0 Diff since v1.72.6 Merged pull requests: Bump actions/github-script from 6.4.1 to 8.0.0 (#823) (@dependabot[bot]) Bump actions/checkout from 5 to 6 (#827) (@dependabot[bot]) Bump styfle/cancel-workflow-action from 0.12.1 to 0.13.0 (#831) (@dependabot[bot]) Fix rrule for broadcasted over empty Tuple{} (#834) (@ChrisRackauckas-Claude) Closed issues: LoadError: UndefVarError: T not defined in ChainRules (#826) rrule for Broadcast.broadcasted fails when broadcasted over Tuple{} (#830) Get the style directly from the broadcasted object (since julia v1.10) (#832)