Change some hyphens to shy hyphens in flavour text.

Gen III and IV only seem to shy-hyphenate compound words; I determined
whether or not to use a shy hyphen by looking at other instances of the
word.  If it's consistently not hyphenated or just hyphenated on a line
break, I figure they mean for it to be a compound word, e.g.
"kindhearted" rather than "kind-hearted".

"Supereffective" is weird, but they seem to consistently spell it as all
one word when it's an attributive adjective, only ever hyphenating it on
a line break and only spacing it as a predicative adjective.  So I
counted it as a compound word in the flavour text for Filter and Solid
Rock.