Auto merge of #4686 - rust-lang:renovate/lettre-0.x, r=Turbo87

Update Rust crate lettre to v0.10.0-rc.5

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [lettre](https://crates.io/crates/lettre) | dependencies | patch | `=0.10.0-rc.4` -> `=0.10.0-rc.5` |

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Author: bors

Cargo.lock

@@ -62,7 +62,7 @@ http = "=0.2.6"
 hyper = { version = "=0.14.18", features = ["client", "http1"] }
 indexmap = { version = "=1.8.0", features = ["serde-1"] }
 tikv-jemallocator = { version = "=0.4.3", features = ['unprefixed_malloc_on_supported_platforms', 'profiling'] }
-lettre = { version = "=0.10.0-rc.4", default-features = false, features = ["file-transport", "smtp-transport", "native-tls", "hostname", "builder"] }
+lettre = { version = "=0.10.0-rc.5", default-features = false, features = ["file-transport", "smtp-transport", "native-tls", "hostname", "builder"] }
 minijinja = "=0.15.0"
 moka = "=0.8.1"
 oauth2 = { version = "=4.1.0", default-features = false, features = ["reqwest"] }