Update README section "How can I move the cursor by each display line with word wrapping?"

As of vscode 1.52.1, vscodevim 1.18.5 this section is incorrect and leads to errors in config if copied directly.

Firstly, it seems that the format and keywords have changed, which leads to errors.

So instead of what there is, much simpler version with keywords from remap examples above this one works:

    "vim.normalModeKeyBindingsNonRecursive": [
        {
            "before": [
                "up"
            ],
            "commands": [
                "cursorUp"
            ]
        },
        {
            "before": [
                "down"
            ],
            "commands": [
                "cursorDown"
            ]
        },
        {
            "before": [
                "k"
            ],
            "commands": [
                "cursorUp"
            ]
        },
        {
            "before": [
                "j"
            ],
            "commands": [
                "cursorDown"
            ]
        }
    ]

Secondly, it says that binds such as 10j won't work, but they work correctly (at least now). Each wrapped line counts as real line during this jump.

I am not an experienced vscode or vscodevim user, so please update the documentation the way you think is right.

CC: @karlhorky #2924

Open the README section "How can I move the cursor by each display line with word wrapping?" and compare it with the remap examples immediately above. Update the obsolete configuration and the statement about numeric jumps so the documentation reflects the reported VS CodeVim behavior; done means the copied example uses current keywords and no longer makes incorrect claims.