Fix README formatting bug

Author: japhb

README.md

@@ -138,7 +138,7 @@ For best results change Ghostty's base font; the default used in 1.2.x produces
 
 To use a different font, you can set Ghostty's `font-family`, either in the config file (`~/.config/ghostty/config` on Linux) or directly using a command-line option to `ghostty`:
 
-    C<ghostty --font-family="DejaVu Sans Mono">
+    ghostty --font-family="DejaVu Sans Mono"
 
 AUTHOR
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lib/Terminal/Tests.rakumod

@@ -231,7 +231,7 @@ To use a different font, you can set Ghostty's C<font-family>, either in the
 config file (C<~/.config/ghostty/config> on Linux) or directly using a
 command-line option to C<ghostty>:
 
-    C<ghostty --font-family="DejaVu Sans Mono">
+    ghostty --font-family="DejaVu Sans Mono"
 
 
 =head1 AUTHOR