Bump assets/themes/Solarized from `87e0109` to `3707f68`

Bumps [assets/themes/Solarized](https://github.com/braver/Solarized) from `87e0109` to `3707f68`.
- [Release notes](https://github.com/braver/Solarized/releases)
- [Commits](87e01090cf...3707f68ddc)

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

assets/themes/Solarized

@@ -1 +1 @@
-Subproject commit 87e01090cf5fb821a234265b3138426ae84900e7
+Subproject commit 3707f68ddc535723c02c65cbc97187c1aa99ad4d