fix: update GitHub URLs from master to main branch

- Replace tree/master with tree/main in all documentation and code comments
- Fix issues/168 -> pull/168 reference (issue was converted to PR)

pezkuwi/node/core/dispute-coordinator/src/initialized.rs

@@ -114,7 +114,7 @@ pub(crate) struct Initialized {
 	/// blocks) we will be too slow importing all votes from unfinalized chains on startup
 	/// (dispute-coordinator gets killed because of unresponsiveness).
 	///
-	/// https://github.com/pezkuwichain/pezkuwi-sdk/issues/168
+	/// https://github.com/pezkuwichain/pezkuwi-sdk/pull/168
 	///
 	/// To resolve this, we limit the amount of votes imported at once to
 	/// `CHAIN_IMPORT_MAX_BATCH_SIZE` and put the rest here for later processing.

pezkuwi/node/service/src/lib.rs

@@ -228,7 +228,7 @@ pub enum Error {
 	InvalidWorkerBinaries { prep_worker_path: PathBuf, exec_worker_path: PathBuf },
 
 	#[cfg(feature = "full-node")]
-	#[error("Worker binaries could not be found, make sure pezkuwi was built and installed correctly. Please see the readme for the latest instructions (https://github.com/pezkuwichain/pezkuwi-sdk/tree/master/pezkuwi). If you ran with `cargo run`, please run `cargo build` first. Searched given workers path ({given_workers_path:?}), pezkuwi binary path ({current_exe_path:?}), and lib path (/usr/lib/pezkuwi), workers names: {workers_names:?}")]
+	#[error("Worker binaries could not be found, make sure pezkuwi was built and installed correctly. Please see the readme for the latest instructions (https://github.com/pezkuwichain/pezkuwi-sdk/tree/main/pezkuwi). If you ran with `cargo run`, please run `cargo build` first. Searched given workers path ({given_workers_path:?}), pezkuwi binary path ({current_exe_path:?}), and lib path (/usr/lib/pezkuwi), workers names: {workers_names:?}")]
 	MissingWorkerBinaries {
 		given_workers_path: Option<PathBuf>,
 		current_exe_path: PathBuf,