docs(node_diagram): change input pointcloud for localization in the n…

…ode diagram (#528)

* Revised node_diagram so that the localization input will be the concatenated/pointcloud

Signed-off-by: TaikiYamada4 <taiki.yamada@tier4.jp>

* Resolved conflict

Signed-off-by: TaikiYamada4 <taiki.yamada@tier4.jp>

* Converted to an openable style

Signed-off-by: TaikiYamada4 <taiki.yamada@tier4.jp>

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Signed-off-by: TaikiYamada4 <taiki.yamada@tier4.jp>