Bump fastai from 1.0.61 to 2.6.3

Bumps [fastai](https://github.com/fastai/fastai) from 1.0.61 to 2.6.3.
- [Release notes](https://github.com/fastai/fastai/releases)
- [Changelog](https://github.com/fastai/fastai/blob/main/CHANGELOG.md)
- [Commits](https://github.com/fastai/fastai/commits/2.6.3)

---
updated-dependencies:
- dependency-name: fastai
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

docker_requirements.txt

@@ -6,7 +6,7 @@ emoji==0.5.4
 epitran==1.25.1
 esupar==1.3.9
 fairseq==0.10.2
-fastai==1.0.61
+fastai==2.6.3
 fastcoref==2.1.6
 gensim==4.3.3
 h5py==3.12.1