chore(deps): bump diesel from 2.2.11 to 2.2.12 in /examples (#626)

Bumps [diesel](https://github.com/diesel-rs/diesel) from 2.2.11 to 2.2.12.
- [Release notes](https://github.com/diesel-rs/diesel/releases)
- [Changelog](https://github.com/diesel-rs/diesel/blob/v2.2.12/CHANGELOG.md)
- [Commits](https://github.com/diesel-rs/diesel/compare/v2.2.11...v2.2.12)

---
updated-dependencies:
- dependency-name: diesel
  dependency-version: 2.2.12
  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

@@ -1064,9 +1064,9 @@ dependencies = [
 
 [[package]]
 name = "diesel"
-version = "2.2.11"
+version = "2.2.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a917a9209950404d5be011c81d081a2692a822f73c3d6af586f0cab5ff50f614"
+checksum = "229850a212cd9b84d4f0290ad9d294afc0ae70fccaa8949dbe8b43ffafa1e20c"
 dependencies = [
  "diesel_derives",
  "libsqlite3-sys",