pscompletions: Add version 3.2.6

[Ryanjiena]

Closes #12921

• [x] I have read the Contributing Guide.

[github-actions[bot]]

All changes look good.

Wait for review from human collaborators.

pscompletions

• [x] Description
• [x] License
• [x] Hashes
• [x] Checkver
• [x] Autoupdate

[aliesbelik]

The project looks quite new, it doesn't fit criteria for Extras bucket in terms

Reasonably well-known and widely used (e.g. if it's a GitHub project, it should have at least 100 stars and/or 50 forks)