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

Author: renovate-bot

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 = "=0.7.2"
 oauth2 = { version = "=4.1.0", default-features = false, features = ["reqwest"] }