Add fbref link

[aymennasri]

@tonyelhabr I tried to mimic the same edits made in the last pkgdown website update in this commit, the github action pkgdown should take care of the rest.

[tonyelhabr]

ah, you know, that pkgdown Github action has been running on every merge to main. it seems the issue blocking rebuilds of the site has been with a function call

Reading vignettes/load-scraped-data.Rmd
Error in `.f()`:
! Failed to render 'vignettes/load-scraped-data.Rmd'.
✖ Quitting from load-scraped-data.Rmd:178-197 [load_fb_advanced_match_stats]
Caused by error:
! Can't combine `..1$Home_Score` <character> and `..2$Home_Score` <double>.
Backtrace:
     ▆
  1. ├─worldfootballR::load_fb_advanced_match_stats(...)
  2. │ └─purrr::map_dfr(urls, .file_reader)
  3. │   └─dplyr::bind_rows(res, .id = .id)
  4. │     └─vctrs::vec_rbind(!!!dots, .names_to = .id, .error_call = current_env())
  5. └─vctrs (local) `<fn>`()
  6.   └─vctrs::vec_default_ptype2(...)
  7.     ├─base::withRestarts(...)
  8.     │ └─base (local) withOneRestart(expr, restarts[[1L]])
  9.     │   └─base (local) doWithOneRestart(return(expr), restart)
 10.     └─vctrs::stop_incompatible_type(...)
 11.       └─vctrs:::stop_incompatible(...)
 12.         └─vctrs:::stop_vctrs(...)
 13.           └─rlang::abort(message, class = c(class, "vctrs_error"), ..., call = call)
 14.