security/py-pyotp: Update to 2.2.6

v2.2.6:

• Fix tests wrt double-quoting in provisioning URIs
  
  v2.2.5:
• Quote issuer QS parameter in provisioning_uri. Fixes #47.
• Raise an exception if a negative integer is passed to at() (#41).
• Documentation and release infrastructure improvements.

PR: 220400
Submitted by: Vladimir Krstulja <vlad-fbsd@acheronmedia.com> (maintainer)
Approved by: garga (mentor, implicit)