Fix dependabot airflow 91 87

[aagbsn]

Upgrade airflow to 2.11.1 to address these issues
https://github.com/ooni/data/security/dependabot/91
https://github.com/ooni/data/security/dependabot/87

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 77.86%. Comparing base (29b1757) to head (4cf1ac7).

❌ Your project check has failed because the head coverage (77.86%) is below the target coverage (80.00%). You can increase the head coverage or adjust the target coverage.

❗ There is a different number of reports uploaded between BASE (29b1757) and HEAD (4cf1ac7). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (29b1757)	HEAD (4cf1ac7)
oonipipeline	1	0

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #159      +/-   ##
==========================================
- Coverage   83.92%   77.86%   -6.07%     
==========================================
  Files          85       33      -52     
  Lines        5220     1938    -3282     
==========================================
- Hits         4381     1509    -2872     
+ Misses        839      429     -410     

Flag	Coverage Δ
oonidata	77.86% <ø> (ø)
oonipipeline	?

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