Switch from probe-run to probe-rs-cli.

- probe-run screwed up the last release 2 weeks ago and it's still not fixed (issue 391). Doesn't look well maintained.
- Even when it's not broken, it lags behind probe-rs-cli in new chips support because it's slow in updating probe-rs.

examples/nrf52840/src/bin/nvmc.rs

@@ -14,7 +14,7 @@ async fn main(_spawner: Spawner) {
     let p = embassy_nrf::init(Default::default());
     info!("Hello NVMC!");
 
-    // probe-run breaks without this, I'm not sure why.
+    // probe-rs-cli run breaks without this, I'm not sure why.
     Timer::after(Duration::from_secs(1)).await;
 
     let mut f = Nvmc::new(p.NVMC);