Update sqlite3 requirement from ~> 2.5.0 to ~> 2.6.0

Updates the requirements on [sqlite3](https://github.com/sparklemotion/sqlite3-ruby) to permit the latest version.
- [Release notes](https://github.com/sparklemotion/sqlite3-ruby/releases)
- [Changelog](https://github.com/sparklemotion/sqlite3-ruby/blob/main/CHANGELOG.md)
- [Commits](sparklemotion/sqlite3-ruby@v2.5.0...v2.6.0)

---
updated-dependencies:
- dependency-name: sqlite3
  dependency-type: direct:development
...

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

Gemfile

@@ -13,6 +13,6 @@ group :development, :test do
   gem "gc_ruboconfig", "~> 5.0.0"
   gem "rspec", "~> 3.9"
   gem "rspec-github", "~> 3.0.0"
-  gem "sqlite3", "~> 2.5.0"
+  gem "sqlite3", "~> 2.6.0"
   gem "yard", "~> 0.9.20"
 end