fix: format IP address with {:i}

[gingk1212]

{:ipv4} has been replaced with {:i} in aya-rs/aya#599.

This is causing the following compile error.

error: could not parse the format string: unknown display hint: "ipv4"
  --> src/main.rs:68:9
   |
68 |         "SRC IP: {:ipv4}, SRC PORT: {}", source_addr, source_port
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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[gingk1212]

The build failure with "kprobetcp" example is due to the presence of Cargo.lock. This Cargo.lock refers to the old main branch of aya-rs/aya.

I think this file should be removed from the repository, can I remove it?

[tamird]

I think this is being worked on in #118. Apologies this didn't get a review in a timely manner.