Bump assets/themes/zenburn from `7f6fb86` to `702023d`

Bumps [assets/themes/zenburn](https://github.com/colinta/zenburn) from `7f6fb86` to `702023d`.
- [Release notes](https://github.com/colinta/zenburn/releases)
- [Commits](7f6fb86e0d...702023d80d)

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

assets/themes/zenburn

@@ -1 +1 @@
-Subproject commit 7f6fb86e0dcdd06d3c5181ad1cbe94c970834143
+Subproject commit 702023d80d9f845a5847eefc4c81c2d4dbbdac59