Bump actix-files from 0.6.5 to 0.6.6 in /examples (#389)

Bumps [actix-files](https://github.com/actix/actix-web) from 0.6.5 to 0.6.6.
- [Release notes](https://github.com/actix/actix-web/releases)
- [Changelog](https://github.com/actix/actix-web/blob/v0.6.6/CHANGES.md)
- [Commits](https://github.com/actix/actix-web/compare/v0.6.5...v0.6.6)

---
updated-dependencies:
- dependency-name: actix-files
  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

@@ -46,9 +46,9 @@ dependencies = [
 
 [[package]]
 name = "actix-files"
-version = "0.6.5"
+version = "0.6.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bf0bdd6ff79de7c9a021f5d9ea79ce23e108d8bfc9b49b5b4a2cf6fad5a35212"
+checksum = "0773d59061dedb49a8aed04c67291b9d8cf2fe0b60130a381aab53c6dd86e9be"
 dependencies = [
  "actix-http",
  "actix-service",