Fix broken decorative angle brackets

Decorative angle brackets (used for terminal prompt) were ruined[1]
because of this issue:
be5invis#2603

Later commits added the option to customize them[2], so this commit
uses that to fix them.

[1]: be5invis#2623
[2]: be5invis#2648

private-build-plans.toml

@@ -18,6 +18,7 @@ asterisk = "penta-low"
 brace = "curly-flat-boundary"
 percent = "rings-continuous-slash"
 pilcrow = "low"
+decorative-angle-brackets = "tall"
 
 [buildPlans.IosevkaSharpie.ligations]
 inherits = "dlig"