build(deps): bump sqlite3 from 1.6.6 to 1.6.8

Bumps [sqlite3](https://github.com/sparklemotion/sqlite3-ruby) from 1.6.6 to 1.6.8.
- [Release notes](https://github.com/sparklemotion/sqlite3-ruby/releases)
- [Changelog](https://github.com/sparklemotion/sqlite3-ruby/blob/master/CHANGELOG.md)
- [Commits](sparklemotion/sqlite3-ruby@v1.6.6...v1.6.8)

---
updated-dependencies:
- dependency-name: sqlite3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile.lock

@@ -62,7 +62,7 @@ GEM
     logging (2.3.1)
       little-plugger (~> 1.1)
       multi_json (~> 1.14)
-    mini_portile2 (2.8.4)
+    mini_portile2 (2.8.5)
     minitest (5.20.0)
     mono_logger (1.1.2)
     multi_json (1.15.0)
@@ -133,7 +133,7 @@ GEM
     sentry-ruby-core (4.7.1)
       concurrent-ruby
       faraday
-    sqlite3 (1.6.6)
+    sqlite3 (1.6.8)
       mini_portile2 (~> 2.8.0)
     stringio (3.0.8)
     tzinfo (2.0.6)