Bump nh3 from 0.2.18 to 0.2.20 in /src/requirements

Bumps [nh3](https://github.com/messense/nh3) from 0.2.18 to 0.2.20.
- [Release notes](https://github.com/messense/nh3/releases)
- [Commits](messense/nh3@v0.2.18...v0.2.20)

---
updated-dependencies:
- dependency-name: nh3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

src/requirements/production.txt

@@ -25,7 +25,7 @@ html5lib==1.1
 icalendar==6.0.0
 irc3==1.1.10
 lxml==5.3.0
-nh3==0.2.18
+nh3==0.2.20
 olefile==0.47
 openpyxl==3.1.2
 pandas==2.2.3