Fix broken image links in ref docs.

[mconner]

what-is-spring-ws.adoc, under Runtime Environment, there's supposed to be an image for
/spring-projects/spring-ws/raw/main/src/main/asciidoctor/spring-deps.png
It looks like this is supposed to be:
/spring-projects/spring-ws/raw/main/src/main/asciidoctor/images/spring-deps.png

Also, even when this is corrected, when viewed in dark mode (switch at top of doc), the arrows in the diagram are not visible..

[gregturn]

Confirmed @mconner!

I also verified that inserting "images/" in front of it fixes the issue. Also, turns out this isn't the only image directive.

[mconner]

That was fast!
However, this will not fix the dark-mode issue, correct?

[gregturn]

No. I'm not quite sure what to do on that front.

[gregturn]

Perhaps open a separate ticket to track that.

[mconner]

No. I'm not quite sure what to do on that front.

The issue appears to be that the image has a transparent background, Maybe add some css to make it white, since the image(s) is(are) assuming that, anyway?