[Mbed-OS 5.11 OoB] documentation typo

[soleilplanet]

Description

In the readme, it writes:
For example, in order to compile using the ARM GCC compiler and a K64F target platform use: mbed compile -m K64F -t ARM
However, -t ARM is for ARMCC, for GCC it should be GCC_ARM.

Issue request type

[ ] Question
[x] Enhancement
[ ] Bug

[adbridge]

Apologies, this was closed in error by the automated bot - re-opening.

[ciarmcom]

Thank you for raising this detailed GitHub issue. I am now notifying our internal issue triagers.
Internal Jira reference: https://jira.arm.com/browse/IOTOSM-2108