Fix lychee findings

POLICIES.md

@@ -24,7 +24,7 @@ If you have read through the references that informed an existing policy and sti
 When contributing code to this repository, it should follow the [bash style guide] to avoid having an inconsistent style.
 This is most important for the tests, since they are delivered as a product, and should be as idiomatic as possible, and this will help maintain a certain level of consistency.
 
-[bash style guide]: https://google.github.io/styleguide/shell.xml
+[bash style guide]: https://google.github.io/styleguide/shellguide.html
 
 ### Prefer standard Bash over POSIX compliance
 

docs/RESOURCES.md

@@ -1,12 +1,12 @@
 # Resources
 
 - Bash man page: to view it, type `man bash` in a terminal.
-- [Bash Guide](http://mywiki.wooledge.org/BashGuide)
-- [Bash FAQ](http://mywiki.wooledge.org/BashFAQ)
+- [Bash Guide](https://mywiki.wooledge.org/BashGuide)
+- [Bash FAQ](https://mywiki.wooledge.org/BashFAQ)
 - [Bash Pitfalls](https://mywiki.wooledge.org/BashPitfalls)
-- [GNU Bash Manual](http://gnu.org/s/bash/manual)
+- [GNU Bash Manual](https://gnu.org/s/bash/manual)
 - [Bash-Hackers Wiki](https://web.archive.org/web/20230323071638/https://wiki.bash-hackers.org/)
-- [Shellcheck provides shell script guidelines and help](http://www.shellcheck.net/)
+- [Shellcheck provides shell script guidelines and help](https://www.shellcheck.net/)
 
 The Command Line Heroes podcast released an episode on the
 [history of bash](https://www.redhat.com/en/command-line-heroes/season-3/heroes-in-a-bash-shell)

reference/implementing-a-concept-exercise.md

@@ -2,4 +2,4 @@
 
 TODO: describe how to implement a concept exercise for the Bash track. For inspiration, check out the [C# version of this file][csharp-implementing].
 
-[csharp-implementing]: https://github.com/exercism/v3/blob/main/csharp/reference/implementing-a-concept-exercise.md
+[csharp-implementing]: https://github.com/exercism/csharp/blob/main/reference/implementing-a-concept-exercise.md