Replace hardcoded edge links in guides

One link to edgeapi -> api

Two hardcoded links to edgeguides -> relative links

Searching edgeapi now only results in links that are explicitly supposed
to be to edgeapi.

There are still some links to edgeguides, however they seem to be
consistent:

- a link to _overview or _basics in a framework's README
- any link to contributing_to_ruby_on_rails
- a link to security.html in gemspecs

guides/source/action_text_overview.md

@@ -145,7 +145,7 @@ GlobalID](https://github.com/rails/globalid#signed-global-ids).
 Action Text renders embedded `<action-text-attachment>` elements by resolving
 their `sgid` attribute into an instance. Once resolved, that instance is passed
 along to
-[`render`](https://edgeapi.rubyonrails.org/classes/ActionView/Helpers/RenderingHelper.html#method-i-render).
+[`render`](https://api.rubyonrails.org/classes/ActionView/Helpers/RenderingHelper.html#method-i-render).
 The resulting HTML is embedded as a descendant of the `<action-text-attachment>`
 element.
 

guides/source/autoloading_and_reloading_constants.md

@@ -309,7 +309,7 @@ Corollary: Those classes or modules **cannot be reloadable**.
 
 The easiest way to refer to those classes or modules during boot is to have them defined in a directory which does not belong to the autoload paths. For instance, `lib` is an idiomatic choice. It does not belong to the autoload paths by default, but it does belong to `$LOAD_PATH`. Just perform a regular `require` to load it.
 
-As noted above, another option is to have the directory that defines them in the autoload once paths and autoload. Please check the [section about config.autoload_once_paths](https://edgeguides.rubyonrails.org/autoloading_and_reloading_constants.html#config-autoload-once-paths) for details.
+As noted above, another option is to have the directory that defines them in the autoload once paths and autoload. Please check the [section about config.autoload_once_paths](#config-autoload-once-paths) for details.
 
 Eager Loading
 -------------

guides/source/contributing_to_ruby_on_rails.md

@@ -492,7 +492,7 @@ The Ruby on Rails [guides](https://guides.rubyonrails.org/) provide a high-level
 
 If your PR adds a new feature, or changes how an existing feature behaves, check the relevant documentation, and update it or add to it as necessary.
 
-For example, if you modify Active Storage's image analyzer to add a new metadata field, you should update the [Analyzing Files](https://edgeguides.rubyonrails.org/active_storage_overview.html#analyzing-files) section of the Active Storage guide to reflect that.
+For example, if you modify Active Storage's image analyzer to add a new metadata field, you should update the [Analyzing Files](active_storage_overview.html#analyzing-files) section of the Active Storage guide to reflect that.
 
 ### Updating the CHANGELOG