README: Update Limitations section #1420

Job	Run time
Linter on C code	15s
Code coverage	5m 51s
Clone, build, test	4m 59s
Check misspellings	13s
Build and test the Speculos docker / Build Speculos Docker image	3m 17s
Build and test the Speculos docker / Build application using the reusable workflow / Check if app is based on Rust / Check if app is based on Rust	7s
Build and test the Speculos docker / Build application using the reusable workflow / Build application for NanoS, X, S+, and Stax (nanos)	52s
Build and test the Speculos docker / Build application using the reusable workflow / Build application for NanoS, X, S+, and Stax (nanox)	42s
Build and test the Speculos docker / Build application using the reusable workflow / Build application for NanoS, X, S+, and Stax (nanosp)	44s
Build and test the Speculos docker / Build application using the reusable workflow / Build application for NanoS, X, S+, and Stax (stax)	53s
Build and test the Speculos docker / Functional tests with Ragger (nanos)	1m 44s
Build and test the Speculos docker / Functional tests with Ragger (nanox)	1m 34s
Build and test the Speculos docker / Functional tests with Ragger (nanosp)	1m 23s
Build and test the Speculos docker / Functional tests with Ragger (stax)	3m 6s
Build and deploy Speculos Python Package	3m 40s
Build and Upload the Speculos docker	0s
	29m 20s

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