dchat: add libsqlite3-sys dependency to Cargo.toml

example/dchat/Cargo.toml

@@ -27,4 +27,5 @@ url = "2.4.0"
 serde_json = "1.0.104"
 serde = {version = "1.0.179", features = ["derive"]}
 toml = "0.7.6"
+libsqlite3-sys = {version = "0.26.0", features = ["bundled-sqlcipher-vendored-openssl"]}
 # ANCHOR_END: dependencies