Incorrect statement about admonitions

[daobrien]

3.10. Using Admonitions

This section contains the following statement:

"Admonitions automatically include a suitable title according to the type of
admonition."

This is only true if you use the publican or flamel build tools and associated XSL.
We need to update this to better reflect reality.

[julian-cable]

Updated this statement:
"Depending on the tools and workflow, admonitions might automatically include a suitable title according to the type of admonition."