Bump diesel from 1.4.6 to 1.4.7

Bumps [diesel](https://github.com/diesel-rs/diesel) from 1.4.6 to 1.4.7.
- [Release notes](https://github.com/diesel-rs/diesel/releases)
- [Changelog](https://github.com/diesel-rs/diesel/blob/v1.4.7/CHANGELOG.md)
- [Commits](diesel-rs/diesel@v1.4.6...v1.4.7)

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

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

Cargo.toml

@@ -18,7 +18,7 @@ codecov = { repository = "saschagrunert/webapp.rs", branch = "master", service =
 maintenance = { status = "actively-developed" }
 
 [dependencies]
-diesel = { version = "1.4.6", optional = true }
+diesel = { version = "1.4.7", optional = true }
 anyhow = "1.0.40"
 serde = { version = "1.0.126", features = ["derive"] }
 toml = "0.5.8"

backend/Cargo.toml

@@ -35,7 +35,7 @@ actix-web = { version = "3.3.2", features = ["openssl"] }
 anyhow = "1.0.40"
 bytes = "1.0.1"
 clap = { version = "2.33.3", features = ["yaml"] }
-diesel = { version = "1.4.6", features = ["r2d2", "postgres"] }
+diesel = { version = "1.4.7", features = ["r2d2", "postgres"] }
 env_logger = "0.8.3"
 futures = "0.3.15"
 jsonwebtoken = "7.2.0"