test: update expected READMEs for doc link

Author: github-actions[bot]

tests/fixtures/expected/c-extension/README.md

@@ -8,6 +8,8 @@
 
 Lua library.
 
+Check out the [documentation] for guides and examples.
+
 ## ✨ Features
 
 - **Multiple Lua Versions**: Compatible with LuaJIT, Lua 5.1, 5.2, 5.3, 5.4, and
@@ -24,3 +26,5 @@ luarocks install c-extension
 ```lua
 local c_extension = require "c-extension"
 ```
+
+[documentation]: https://bluelua.github.io/c-extension

tests/fixtures/expected/empty-repo/README.md

@@ -8,6 +8,8 @@
 
 A short description of your Lua package.
 
+Check out the [documentation] for guides and examples.
+
 ## ✨ Features
 
 - Feature item 1
@@ -29,3 +31,5 @@ local empty_repo = require "empty-repo"
 
 my_lib.do_something()
 ```
+
+[documentation]: https://bluelua.github.io/empty-repo

tests/fixtures/expected/full-os/README.md

@@ -8,6 +8,8 @@
 
 Lua library.
 
+Check out the [documentation] for guides and examples.
+
 ## ✨ Features
 
 - **Multiple Lua Versions**: Compatible with LuaJIT, Lua 5.1, 5.2, 5.3, 5.4, and
@@ -25,3 +27,5 @@ luarocks install full-os
 ```lua
 local full_os = require "full-os"
 ```
+
+[documentation]: https://bluelua.github.io/full-os

tests/fixtures/expected/linux-only/README.md

@@ -8,6 +8,8 @@
 
 Lua library.
 
+Check out the [documentation] for guides and examples.
+
 ## ✨ Features
 
 - **Multiple Lua Versions**: Compatible with LuaJIT, Lua 5.1, 5.2, 5.3, 5.4, and
@@ -24,3 +26,5 @@ luarocks install linux-only
 ```lua
 local linux_only = require "linux-only"
 ```
+
+[documentation]: https://bluelua.github.io/linux-only

tests/fixtures/expected/new-repo/README.md

@@ -8,6 +8,8 @@
 
 A short description of your Lua package.
 
+Check out the [documentation] for guides and examples.
+
 ## ✨ Features
 
 - Feature item 1
@@ -29,3 +31,5 @@ local new_repo = require "new-repo"
 
 my_lib.do_something()
 ```
+
+[documentation]: https://bluelua.github.io/new-repo

tests/fixtures/expected/pure-lua/README.md

@@ -8,6 +8,8 @@
 
 Lua library.
 
+Check out the [documentation] for guides and examples.
+
 ## ✨ Features
 
 - **Multiple Lua Versions**: Compatible with LuaJIT, Lua 5.1, 5.2, 5.3, 5.4, and
@@ -25,3 +27,5 @@ luarocks install pure-lua-package
 ```lua
 local pure_lua = require "pure-lua"
 ```
+
+[documentation]: https://bluelua.github.io/pure-lua