fix: Update reference URL in font specification (ant-design#56859)

* fix: Update reference URL in font specification

Signed-off-by: Tarek BAZINE <et_bazine@esi.dz>

* Update docs/spec/font.en-US.md

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
Signed-off-by: 二货爱吃白萝卜 <smith3816@gmail.com>

* Update references in font specification document

Signed-off-by: 二货爱吃白萝卜 <smith3816@gmail.com>

---------

Signed-off-by: Tarek BAZINE <et_bazine@esi.dz>
Signed-off-by: 二货爱吃白萝卜 <smith3816@gmail.com>
Co-authored-by: 二货爱吃白萝卜 <smith3816@gmail.com>
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: 3 people

docs/spec/font.en-US.md

@@ -26,7 +26,7 @@ In order to implement a good font system, the first thing is to choose an approp
   'Noto Color Emoji';
 ```
 
-> References：https://www.smashingmagazine.com/2015/11/using-system-ui-fonts-practical-guide/ and http://markdotto.com/2018/02/07/github-system-fonts/
+> References: https://www.smashingmagazine.com/2015/11/using-system-ui-fonts-practical-guide/ and https://markdotto.com/blog/github-system-fonts/
 
 In addition, in many applications, numbers often need to be displayed vertically. We recommend setting the CSS property `font-variant-numeric` to `tabular-nums` to use [tabular figures](https://www.fonts.com/content/learning/fontology/level-3/numbers/proportional-vs-tabular-figures).
 

docs/spec/font.zh-CN.md

@@ -26,7 +26,7 @@ title: 字体
   'Noto Color Emoji';
 ```
 
-> 参考自 https://www.smashingmagazine.com/2015/11/using-system-ui-fonts-practical-guide/ 和 http://markdotto.com/2018/02/07/github-system-fonts/
+> 参考自 https://www.smashingmagazine.com/2015/11/using-system-ui-fonts-practical-guide/ 和 https://markdotto.com/blog/github-system-fonts/
 
 另外，在中后台系统中，数字经常需要进行纵向对比展示，我们推荐将数字的字体 [font-variant-numeric](https://www.fonts.com/content/learning/fontology/level-3/numbers/proportional-vs-tabular-figures) 设置为 `tabular-nums`，使其为等宽字体。