Update configuration_big_bird.py
Fixing backtick alignments

# What does this PR do?

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Fixes # (issue)


## Before submitting
- [x] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
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      Pull Request section?
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- [ ] Did you write any new necessary tests?


## Who can review?

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Models:

- albert, bert, xlm: @LysandreJik
- blenderbot, bart, marian, pegasus, encoderdecoder,  t5: @patrickvonplaten, @patil-suraj
- longformer, reformer, transfoxl, xlnet: @patrickvonplaten
- fsmt: @stas00
- funnel: @sgugger
- gpt2: @patrickvonplaten, @LysandreJik
- rag: @patrickvonplaten, @lhoestq
- tensorflow: @LysandreJik

Library:

- benchmarks: @patrickvonplaten
- deepspeed: @stas00
- ray/raytune: @richardliaw, @amogkam
- text generation: @patrickvonplaten
- tokenizers: @n1t0, @LysandreJik
- trainer: @sgugger
- pipelines: @LysandreJik

Documentation: @sgugger

HF projects:

- datasets: [different repo](https://github.com/huggingface/datasets)
- rust tokenizers: [different repo](https://github.com/huggingface/tokenizers)

Examples:

- maintained examples (not research project or legacy): @sgugger, @patil-suraj
- research_projects/bert-loses-patience: @JetRunner
- research_projects/distillation: @VictorSanh

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The docs for this PR live [here](https://moon-ci-docs.huggingface.co/docs/transformers/pr_16064). All of your documentation changes will be reflected on that endpoint.<|||||>@patil-suraj Sry for the late response, Any idea on what would be the problem? 
```bash
make style
black examples tests src utils
Skipping .ipynb files as Jupyter dependencies are not installed.
You can fix this by running ``pip install black[jupyter]``
All done! ✨ 🍰 ✨
1489 files left unchanged.
isort examples tests src utils
Skipped 1 files
make autogenerate_code
make[1]: Entering directory '/home/parano/github/dev/transformers'
  File "setup.py", line 212
    entries = "\n".join([f'    "{k}": "{v}",' for k, v in deps.items()])
                                            ^
SyntaxError: invalid syntax
make[1]: *** [Makefile:22: deps_table_update] Error 1
make[1]: Leaving directory '/home/parano/github/dev/transformers'
make: *** [Makefile:64: style] Error 2

```<|||||>> @patil-suraj Sry for the late response, Any idea on what would be the problem?
> 
> ```shell
> make style
> black examples tests src utils
> Skipping .ipynb files as Jupyter dependencies are not installed.
> You can fix this by running ``pip install black[jupyter]``
> All done! ✨ 🍰 ✨
> 1489 files left unchanged.
> isort examples tests src utils
> Skipped 1 files
> make autogenerate_code
> make[1]: Entering directory '/home/parano/github/dev/transformers'
>   File "setup.py", line 212
>     entries = "\n".join([f'    "{k}": "{v}",' for k, v in deps.items()])
>                                             ^
> SyntaxError: invalid syntax
> make[1]: *** [Makefile:22: deps_table_update] Error 1
> make[1]: Leaving directory '/home/parano/github/dev/transformers'
> make: *** [Makefile:64: style] Error 2
> ```

Make sure you have python>=>=3.6.0 and the required versions black. You can install the correct style deps by using

`pip install transformers["quality"]`<|||||>@patil-suraj The problem arises since `make` by default assumes that when we call `python` we mean `python2`, not `python3` (At least in my system, ubuntu 20.04.4 LTS), may be we should change the `python` commands in the `setup.py` and `Makefile` to `python3`, since making and `alternative` or `alias` for python3 is not actually a very good idea (as can be seen they are not presenting the same kind of functionalities ... ) We might also ask for the comments of maintainers ... <|||||>This issue has been automatically marked as stale because it has not had recent activity. If you think this still needs to be addressed please comment on this thread.

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