Add weeks translation for Hebrew

[yammesicka]

Pull Request Checklist

Thank you for taking the time to improve Arrow! Before submitting your pull request, please check all appropriate boxes:

• [x] 🧪 Added tests for changed code.
• [x] 🛠️ All tests pass when run locally (run tox or make test to find out!).
• [x] 🧹 All linting checks pass when run locally (run tox -e lint or make lint to find out!).
• [N/A] 📚 Updated documentation for changed code.
• [x] ⏩ Code is up-to-date with the master branch.

Description of Changes

Add Hebrew translation for "weeks". Currently I catch the ValueError in my codebase to prevent arrow from crashing when trying to humanize weeks :)

[codecov-commenter]

Codecov Report

Merging #794 into master will not change coverage. The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master      #794   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           10        10           
  Lines         1678      1713   +35     
  Branches       289       295    +6     
=========================================
+ Hits          1678      1713   +35     

Impacted Files	Coverage Δ
arrow/locales.py	100.00% <100.00%> (ø)
arrow/arrow.py	100.00% <0.00%> (ø)
arrow/parser.py	100.00% <0.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update b8a6011...46eaaf0. Read the comment docs.

[yammesicka]

Sure, done.

[yammesicka]

There is now support for every edge-case I can think about, and probably more tests than in any other language :)

[krisfremen]

Very nice!

Toda rabah @yammesicka!