Upgrade wording consistency

[esarver]

The CLI arguments were still expecting update instead of upgrade. Change this for consistency.

[github-actions]

Package	Line Rate	Health
kic-discover/src/lib.rs	0%	❌
kic/src/main.rs	0%	❌
kic-discover/src/instrument_discovery/mod.rs	0%	❌
instrument-repl/src/resources/mod.rs	100%	✔
instrument-repl/src/instrument.rs	86%	✔
kic-discover/src/usbtmc/mod.rs	0%	❌
kic-discover/src/ethernet/mod.rs	0%	❌
instrument-repl/src/state_machine.rs	63%	✔
kic/src/process.rs	0%	❌
instrument-repl/src/tsp_error.rs	0%	❌
instrument-repl/src/error.rs	0%	❌
kic-discover/src/main.rs	0%	❌
instrument-repl/src/repl.rs	0%	❌
kic/src/error.rs	0%	❌
Summary	17% (295 / 1772)	❌