Bump briefcase from 0.3.14 to 0.3.26

Bumps [briefcase](https://github.com/beeware/briefcase) from 0.3.14 to 0.3.26.
- [Release notes](https://github.com/beeware/briefcase/releases)
- [Commits](beeware/briefcase@v0.3.14...v0.3.26)

---
updated-dependencies:
- dependency-name: briefcase
  dependency-version: 0.3.26
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements-dev.txt

@@ -1,4 +1,4 @@
-briefcase==0.3.14
+briefcase==0.3.26
 toga==0.3.1
 tinydb==4.7.1
 pytest==7.3.1