Bump babel from 2.10.1 to 2.10.3 (pycontribs#1408)

Bumps [babel](https://github.com/python-babel/babel) from 2.10.1 to 2.10.3.
- [Release notes](https://github.com/python-babel/babel/releases)
- [Changelog](https://github.com/python-babel/babel/blob/master/CHANGES.rst)
- [Commits](python-babel/babel@v2.10.1...v2.10.3)

---
updated-dependencies:
- dependency-name: babel
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

constraints.txt

@@ -12,7 +12,7 @@ atomicwrites==1.4.1
     # via pytest
 attrs==21.4.0
     # via pytest
-babel==2.10.1
+babel==2.10.3
     # via sphinx
 backcall==0.2.0
     # via ipython