Fix trailing semicolon warnings on latest rustc nightly

Fix trailing semicolon warnings on latest rustc nightly

Latest rustc nightly compiles are filled with warnings like the
following, which we fix here:

```
warning: trailing semicolon in macro used in expression position
   --> lightning/src/util/macro_logger.rs:163:114
    |
163 |         $logger.log(&$crate::util::logger::Record::new($lvl, format_args!($($arg)+), module_path!(), file!(), line!()));
    |                                                                                                                        ^
    |
   ::: lightning/src/chain/chainmonitor.rs:165:9
    |
165 |         log_debug!(self.logger, "New best block {} at height {} provided via block_connected", header.block_hash(), height);
    |         -------------------------------------------------------------------------------------------------------------------- in this macro invocation
    |
    = note: `#[warn(semicolon_in_expressions_from_macros)]` on by default
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
    = note: this warning originates in the macro `log_internal` (in Nightly builds, run with -Z macro-backtrace for more info)
```