Update fira_code.css

Adding newline at end of file to satisfy pre-commit

Signed-off-by: Bill Traynor <wmat@riscv.org>

Author: wmat

fira_code.css

@@ -45,4 +45,4 @@
   /* font-weight requires a range: https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Fonts/Variable_Fonts_Guide#Using_a_variable_font_font-face_changes */
   font-weight: 300 700;
   font-style: normal;
-}
+}