example: update to defmt v1.0

this was intentionally done in a separate commit to make it clear that
the library update is non-breaking.

Author: rursprung

examples/stm32f4-single-motor-example/Cargo.lock

@@ -7,12 +7,12 @@ license = "MIT OR Apache-2.0"
 [dependencies]
 cortex-m = { version = "0.7", features = ["critical-section-single-core"]}
 cortex-m-rtic = "1.1.4"
-panic-probe = { version = "0.3", features = ["print-defmt"] }
+panic-probe = { version = "1.0", features = ["print-defmt"] }
 
 stm32f4xx-hal = { version = "0.22", features = ["stm32f401", "rtic1"] }
 
-defmt = "0.3.10"
-defmt-rtt = "0.4"
+defmt = "1.0"
+defmt-rtt = "1.0"
 
 # use `tb6612fng = "0.1"` in reality; path used here to ensure that the example always compiles against the latest master
 tb6612fng = { path = "../.." }