chore(deps): bump diesel from 2.2.6 to 2.2.7 in /examples (#540)

Bumps [diesel](https://github.com/diesel-rs/diesel) from 2.2.6 to 2.2.7.
- [Release notes](https://github.com/diesel-rs/diesel/releases)
- [Changelog](https://github.com/diesel-rs/diesel/blob/v2.2.7/CHANGELOG.md)
- [Commits](https://github.com/diesel-rs/diesel/compare/v2.2.6...v2.2.7)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

examples/Cargo.lock

@@ -987,9 +987,9 @@ dependencies = [
 
 [[package]]
 name = "diesel"
-version = "2.2.6"
+version = "2.2.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ccf1bedf64cdb9643204a36dd15b19a6ce8e7aa7f7b105868e9f1fad5ffa7d12"
+checksum = "04001f23ba8843dc315804fa324000376084dfb1c30794ff68dd279e6e5696d5"
 dependencies = [
  "diesel_derives",
  "libsqlite3-sys",