docs: Fix a number of broken links in the generated docs

Changelog-None

doc/FUZZING.md

@@ -65,7 +65,8 @@ In order to write a new target:
      repeatedly with mutated data.
  - read about [what makes a good fuzz target](https://github.com/google/fuzzing/blob/master/docs/good-fuzz-target.md).
 
-A simple example is [`fuzz-addr`][tests/fuzz/fuzz-addr.c]. It setups the chainparams and
-context (wally, tmpctx, ..) in `init()` then bruteforces the bech32 encoder in `run()`.
+A simple example is [`fuzz-addr`][fuzz-addr]. It setups the
+chainparams and context (wally, tmpctx, ..) in `init()` then
+bruteforces the bech32 encoder in `run()`.
 
-[tests/fuzz/fuzz-addr.c]: https://github.com/ElementsProject/lightning/blob/master/tests/fuzz/fuzz-addr.c
+[fuzz-addr]: https://github.com/ElementsProject/lightning/blob/master/tests/fuzz/fuzz-addr.c

doc/PLUGINS.md

@@ -1794,3 +1794,6 @@ The plugin must broadcast it and respond with the following fields:
 [contrib/plugins]: https://github.com/ElementsProject/lightning/tree/master/contrib/plugins
 [tests]: https://github.com/ElementsProject/lightning/tree/master/tests
 [lightning-rpc.7.md]: lightningd-rpc.7.md
+[example-plugin]: https://github.com/ElementsProject/lightning/blob/master/contrib/plugins/helloworld.py
+[cln-tests]: https://github.com/ElementsProject/lightning/tree/master/tests
+[cln-repo]: https://github.com/lightningd/plugins

doc/schemas/WRITING_SCHEMAS.md

@@ -45,8 +45,9 @@ are allowed by omitted from the documentation.
 You should always list all fields which are *always* present in
 `"required"`.
 
-We extend the basic types; see
-[fixtures.py][contrib/pyln-testing/pyln/testing/fixtures.py].
+We extend the basic types; see [fixtures.py][fixtures].
+
+[fixtures]: https://github.com/ElementsProject/lightning/blob/master/contrib/pyln-testing/pyln/testing/fixtures.py
 
 In addition, before committing a new schema or a new version of it, make sure that it
 is well formatted. If you don't want do it by hand, use `make fmt-schema` that uses

mkdocs.yml

@@ -26,11 +26,6 @@ markdown_extensions:
   - pymdownx.superfences
   - toc:
       toc_depth: 2
-
-python:
-   install:
-   - requirements: doc/requirements.txt
-
 nav:
   - "Welcome": index.md
   - Users: