suggest to track repo w/ https rather than ssh
cf #1943 we tell users to track the repository via https rather than ssh (as it requires us to enable ssh).
# [Codecov](https://codecov.io/gh/huggingface/transformers/pull/1952?src=pr&el=h1) Report
> Merging [#1952](https://codecov.io/gh/huggingface/transformers/pull/1952?src=pr&el=desc) into [master](https://codecov.io/gh/huggingface/transformers/commit/8e5d84fcc1a645d3c13b8a2f64fa995637440dad?src=pr&el=desc) will **not change** coverage.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/huggingface/transformers/pull/1952/graphs/tree.svg?width=650&token=9qOlN6Hb1c&height=150&src=pr)](https://codecov.io/gh/huggingface/transformers/pull/1952?src=pr&el=tree)

```diff
@@          Coverage Diff           @@
##           master   #1952   +/-   ##
======================================
  Coverage      84%     84%           
======================================
  Files          97      97           
  Lines       14340   14340           
======================================
  Hits        12047   12047           
  Misses       2293    2293
```



------

[Continue to review full report at Codecov](https://codecov.io/gh/huggingface/transformers/pull/1952?src=pr&el=continue).
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> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/huggingface/transformers/pull/1952?src=pr&el=footer). Last update [8e5d84f...c6edc47](https://codecov.io/gh/huggingface/transformers/pull/1952?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
