Update Rust crate lettre to 0.11.21

geneit_backend/Cargo.lock

@@ -2318,9 +2318,9 @@ checksum = "7a79a3332a6609480d7d0c9eab957bca6b455b91bb84e66d19f5ff66294b85b8"
 
 [[package]]
 name = "lettre"
-version = "0.11.20"
+version = "0.11.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "471816f3e24b85e820dee02cde962379ea1a669e5242f19c61bcbcffedf4c4fb"
+checksum = "dabda5859ee7c06b995b9d1165aa52c39110e079ef609db97178d86aeb051fa7"
 dependencies = [
  "base64",
  "email-encoding",

geneit_backend/Cargo.toml

@@ -23,7 +23,7 @@ serde = { version = "1.0.228", features = ["derive"] }
 serde_json = "1.0.149"
 mailchecker = "6.0.20"
 redis = "1.1.0"
-lettre = "0.11.20"
+lettre = "0.11.21"
 rand = "0.10.0"
 bcrypt = "0.19.0"
 light-openid = "1.1.0"