fix: -t flag added in pull translation command

[edx-requirements-bot]

The transifex command line tool we use to pull translations introduced a fix that broke the existing translation pulls. So, in order to fix this, I've updated thecommand to use the flag along with the existing flags. To get the more context on this, please have a look into this issue

[coveralls]

Pull Request Test Coverage Report for Build 3531639319

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 55.062%

---

Totals
Change from base Build 3524931673:	0.0%
Covered Lines:	168
Relevant Lines:	308

---

💛 - Coveralls

[codecov]

Codecov Report

Base: 57.50% // Head: 57.50% // No change to project coverage 👍

Coverage data is based on head (7ee836a) compared to base (03eb393).
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #78   +/-   ##
=======================================
  Coverage   57.50%   57.50%           
=======================================
  Files          26       26           
  Lines         400      400           
  Branches       66       66           
=======================================
  Hits          230      230           
  Misses        154      154           
  Partials       16       16           

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