Add shoarora/electra and alectra model cards
Add model cards for recently uploaded models:

- shoarora/electra-small-owt (BERT)
- shoarora/alectra-small-owt (ALBERT)
# [Codecov](https://codecov.io/gh/huggingface/transformers/pull/3524?src=pr&el=h1) Report
> Merging [#3524](https://codecov.io/gh/huggingface/transformers/pull/3524?src=pr&el=desc) into [master](https://codecov.io/gh/huggingface/transformers/commit/33ef7002e17fe42b276dc6d36c07a3c39b1f09ed&el=desc) will **decrease** coverage by `0.01%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/huggingface/transformers/pull/3524/graphs/tree.svg?width=650&height=150&src=pr&token=9qOlN6Hb1c)](https://codecov.io/gh/huggingface/transformers/pull/3524?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master    #3524      +/-   ##
==========================================
- Coverage   77.80%   77.79%   -0.02%     
==========================================
  Files         100      100              
  Lines       17051    17051              
==========================================
- Hits        13267    13265       -2     
- Misses       3784     3786       +2     
```


| [Impacted Files](https://codecov.io/gh/huggingface/transformers/pull/3524?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [src/transformers/modeling\_tf\_utils.py](https://codecov.io/gh/huggingface/transformers/pull/3524/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9tb2RlbGluZ190Zl91dGlscy5weQ==) | `88.15% <0.00%> (-0.18%)` | :arrow_down: |
| [src/transformers/modeling\_utils.py](https://codecov.io/gh/huggingface/transformers/pull/3524/diff?src=pr&el=tree#diff-c3JjL3RyYW5zZm9ybWVycy9tb2RlbGluZ191dGlscy5weQ==) | `91.81% <0.00%> (-0.14%)` | :arrow_down: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/huggingface/transformers/pull/3524?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/huggingface/transformers/pull/3524?src=pr&el=footer). Last update [33ef700...daff82d](https://codecov.io/gh/huggingface/transformers/pull/3524?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
<|||||>Model pages:
https://huggingface.co/shoarora/alectra-small-owt
https://huggingface.co/shoarora/electra-small-owt

Thanks for sharing @shoarora 

Did you see those models btw @LysandreJik?