documentation: Some trivial spelling fixes and cca-3world guest filesystem resizing steps update

Fix some of the typo/spelling mistakes.

The buildroot v2024.05 uses/builds newer versions of filesystem handling tools. As a result, sometime when running the steps to resize the guest filesystem from the copy of host filesystem, the listed steps(mainly e2fsck and resize2fs) may fail due to incompatibilities.

Document the ways to fix the incompatibilities by using the tools from the buildroot built copy of host tools which matches the versions correctly.

Signed-off-by: Sudeep Holla sudeep.holla@arm.com