Add missing closing parenthesis to changelog entry

[wilzbach]

Fix the upcoming changelog (https://dlang.org/changelog/2.075.0_pre.html)

Ddoc is a really nasty engine, everyone gets punished if there's a missing parenthesis ...

@CyberShadow should we automatically replace all parenthesis which aren't in macros by the LPAREN or RPAREN to avoid stuff like this in the future?
Or maybe simply counting the braces and making it a hard error? (Ddoc doesn't support this)

[CyberShadow]

@CyberShadow should we automatically replace all parenthesis which aren't in macros by the LPAREN or RPAREN to avoid stuff like this in the future?

I don't think a program can know whether a parenthesis is meant literally or to close a macro.

Or maybe simply counting the braces and making it a hard error?

Yes, we should do that somehow. Doesn't DDoc print a warning for mismatched parentheses currently?

[wilzbach]

Rebased to restart Jenkins (unrelated failure ...)