Update actix-cors requirement from 0.6.5 to 0.7.0 (#550)

Updates the requirements on [actix-cors](https://github.com/actix/actix-extras) to permit the latest version.
- [Release notes](https://github.com/actix/actix-extras/releases)
- [Commits](actix/actix-extras@cors-v0.6.5...cors-v0.7.0)

---
updated-dependencies:
- dependency-name: actix-cors
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Clémentine U. - curqui <[email protected]>

Author: dependabot[bot]

examples/web_app_graphql/Cargo.toml

@@ -7,7 +7,7 @@ authors = ["Eugene Korir <[email protected]>"]
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-actix-cors = "0.6.5"
+actix-cors = "0.7.0"
 actix-web = "4.4.0"
 async-graphql = "6.0.11"
 async-graphql-actix-web = "6.0.11"