doc: install_ncs: minor improvements

[greg-fer]

Added direct links to Downloads in install_ncs/Installing prerequisites. Fixed a line for J-Link version in recommended_versions. TECHDOC-3429.

[NordicBuilder]

CI Information

^{To view the history of this post, clich the 'edited' button above}
Build number: 3

Inputs:

Sources:

more details

Github labels

Enabled	Name	Description
	ci-disabled	Disable the ci execution
	ci-all-test	Run all of ci, no test spec filtering will be done
	ci-force-downstream	Force execution of downstream even if twister fails
	ci-run-twister	Force run twister
	ci-run-zephyr-twister	Force run zephyr twister

List of changed files detected by CI (0)

Outputs:

Toolchain

Version:
Build docker image:

Test Spec & Results: ✅ Success; ❌ Failure; 🟠 Queued; 🟡 Progress; ◻️ Skipped; ⚠️ Quarantine

• ◻️ Toolchain
• ◻️ Build twister
• ◻️ Integration tests

Note: This message is automatically posted and updated by the CI

[NordicBuilder]

You can find the documentation preview for this PR at this link.

Note: This comment is automatically posted by the Documentation Publish GitHub Action.

[pascal-nordic]

I tried to install west system wide using Linux command line with the instruction in the manual:

pip3 install --user -U west

but I got:

[greg-fer]

I tried to install west system wide using Linux command line with the instruction in the manual:

pip3 install --user -U west

but I got:

Sorry, this is not relevant to this PR. Please report this on NCS > General on Teams.

[pascal-nordic]

On the step 5 from Command line in "Get the nRF Connect SDK code", it should specify the the user needs to enter the folder that just got with west init and then run west update. It will fail if the user does it from ncs

[greg-fer]

Fixed.