chore: update testcontainers from 0.25 to 0.26

Author: josecelano

Cargo.toml

@@ -55,7 +55,7 @@ serde = { version = "1.0", features = [ "derive" ] }
 serde_json = "1.0"
 tempfile = "3.0"
 tera = "1.0"
-testcontainers = { version = "0.25", features = [ "blocking" ] }
+testcontainers = { version = "0.26", features = [ "blocking" ] }
 thiserror = "1.0"
 torrust-dependency-installer = { path = "packages/dependency-installer" }
 torrust-linting = { path = "packages/linting" }