fix: Improve string formatting for better readability Update network.rs

[mdqst]

Describe your changes.

In the current implementation, the formatting for strings in fmt::Display is done using the following syntax:

write!(f, "{hostname}{port}")

While this syntax works correctly, it can be improved for better readability and clarity. The revised approach uses a more conventional and straightforward method of formatting:

write!(f, "{}{}", hostname, port)

This change doesn't affect functionality but makes the code easier to read and maintain, following a more common formatting style in Rust.