font: revert switch to non-mono symbols nerd font

This change might be good, but it is incomplete and not relevant to the
PR that it's a part of. I'll explore making this change separately after
this, since it might be a good idea.

(It's incomplete since the attribute data was not re-generated based on
the non-mono file.)

src/build/SharedDeps.zig

@@ -531,7 +531,7 @@ pub fn add(
         const nf_symbols = b.dependency("nerd_fonts_symbols_only", .{});
         step.root_module.addAnonymousImport(
             "nerd_fonts_symbols_only",
-            .{ .root_source_file = nf_symbols.path("SymbolsNerdFont-Regular.ttf") },
+            .{ .root_source_file = nf_symbols.path("SymbolsNerdFontMono-Regular.ttf") },
         );
     }