Fix changelog links in CLIENT-SPECIFICATION.md (#5059)

CLIENT-SPECIFICATION.md

@@ -221,22 +221,22 @@ Caching SHOULD be done according to the user's language configuration (if any),
 
 ## Changelog
 
- - [v1.4, August 13th 2020](https://github.com/tldr-pages/tldr/blob/master/CLIENT-SPECIFICATION.md) (#4246)
+ - [v1.4, August 13th 2020](https://github.com/tldr-pages/tldr/blob/87324c6e540c10a44950b14cd9fb7d758ce4d4e0/CLIENT-SPECIFICATION.md) ([#4246](https://github.com/tldr-pages/tldr/pull/4246))
    - Add requirement for CLI clients to use non-zero exit code on failing to find a page.
 
- - [v1.3, June 11th 2020](https://github.com/tldr-pages/tldr/blob/master/CLIENT-SPECIFICATION.md) (#4101)
+ - [v1.3, June 11th 2020](https://github.com/tldr-pages/tldr/blob/8effb5ba77bbf266909e6f9e5d50727daf4a5431/CLIENT-SPECIFICATION.md) ([#4101](https://github.com/tldr-pages/tldr/pull/4101))
    - Clarified fallback to English in the language resolution algorithm.
    - Update `LANG` and `LANGUAGE` environment variable to conform to the GNU spec.
 
- - [v1.2, July 3rd 2019](https://github.com/tldr-pages/tldr/blob/524d44eb13ff6c0ff70089bd152b075418fc71b2/CLIENT-SPECIFICATION.md) (#3168)
+ - [v1.2, July 3rd 2019](https://github.com/tldr-pages/tldr/blob/d9e1d592e5f7074a5459875ef06a4d4841659ced/CLIENT-SPECIFICATION.md) ([#3168](https://github.com/tldr-pages/tldr/pull/3168))
    - Addition of a new `-L, --language` recommended command-line option.
    - Rewording of the language section also encouraging the use of configuration files for language.
    - Shift from BCP-47 to POSIX style locale tags, with consequent **deprecation of previous versions of the spec**.
    - Clearer clarification about the recommended caching functionality.
    - Correction of the usage of the term "arguments" in the homonym section.
 
- - [v1.1, April 1st 2019](https://github.com/tldr-pages/tldr/blob/fbdc06b7425f92cc0d4fc9a5cfc5860ef017251e/CLIENT-SPECIFICATION.md) (deprecated) (#2859)
+ - [v1.1, April 1st 2019](https://github.com/tldr-pages/tldr/blob/fbdc06b7425f92cc0d4fc9a5cfc5860ef017251e/CLIENT-SPECIFICATION.md) (deprecated) ([#2859](https://github.com/tldr-pages/tldr/pull/2859))
    - Clarified platform section.
 
- - [v1.0, January 23rd 2019](https://github.com/tldr-pages/tldr/blob/f5be8a2614a455288f26e42953efeb8cb3bc50b0/CLIENT-SPECIFICATION.md) (deprecated) (#2706)
+ - [v1.0, January 23rd 2019](https://github.com/tldr-pages/tldr/blob/31d784bc0966883b492f5d1ec66e808b518b2159/CLIENT-SPECIFICATION.md) (deprecated) ([#2706](https://github.com/tldr-pages/tldr/pull/2706))
    - Initial release.