docs: fix links flagged by the weekly link check - #4291 (#4292)

Convert the raw-HTML prev/next nav links in the zarr-indexing guide to
markdown inside `<nav markdown>` blocks, so mkdocs validates and rewrites
them at build time and lychee resolves them as files; the rendered HTML is
unchanged. Update the MDN CORS link in the zarr-http-server guide to its
post-redirect URL, and exclude the bot-blocked Stack Overflow tag page
from lychee.

Assisted-by: ClaudeCode:claude-fable-5

Author: d-v-b

lychee.toml

@@ -22,4 +22,6 @@ exclude = [
   '^https?://(localhost|127\.0\.0\.1)(:\d+)?',
   # SPEC 0 page times out but is valid.
   '^https://scientific-python\.org/specs/spec-0000',
+  # Stack Overflow answers link-checker requests with 403; the tag page is valid.
+  '^https://stackoverflow\.com/questions/tagged/',
 ]

packages/zarr-http-server/changes/4291.doc.md

@@ -0,0 +1 @@
+Updated the MDN CORS link in the user guide to its current URL.

packages/zarr-http-server/docs/guide.md

@@ -215,7 +215,7 @@ bind has no URL to report.
 
 Both app builders accept a [`CorsOptions`][zarr_http_server.CorsOptions]
 parameter to enable
-[CORS](https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS) middleware for
+[CORS](https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/CORS) middleware for
 browser-based clients:
 
 ```python

packages/zarr-indexing/changes/4291.doc.md

@@ -0,0 +1,2 @@
+Rewrote the guide's prev/next navigation links as markdown so mkdocs
+validates them at build time; the rendered pages are unchanged.

packages/zarr-indexing/docs/guide/index.md

@@ -437,8 +437,8 @@ correspondence between every request position and its chunk-local source cell.
 
 ---
 
-<nav aria-label="Guide navigation">
-  <strong>Previous:</strong> <a href="../">zarr-indexing</a>
-  ·
-  <strong>Next:</strong> <a href="patterns/">Indexing patterns</a>
+<nav aria-label="Guide navigation" markdown>
+**Previous:** [zarr-indexing](../index.md)
+·
+**Next:** [Indexing patterns](patterns.md)
 </nav>

packages/zarr-indexing/docs/guide/integrations.md

@@ -207,8 +207,8 @@ that implementation or reproduce its full worker/GPU lifecycle.
 
 ---
 
-<nav aria-label="Reference page navigation">
-  <strong>Previous:</strong> <a href="../patterns/">Indexing pattern reference</a>
-  ·
-  <strong>API:</strong> <a href="../../api/">API reference</a>
+<nav aria-label="Reference page navigation" markdown>
+**Previous:** [Indexing pattern reference](patterns.md)
+·
+**API:** [API reference](../api/index.md)
 </nav>

packages/zarr-indexing/docs/guide/patterns.md

@@ -322,6 +322,6 @@ that distinction with non-zero and negative-origin domains.
 
 ---
 
-<nav aria-label="Reference page navigation">
-  <strong>Next:</strong> <a href="../integrations/">Integration boundaries</a>
+<nav aria-label="Reference page navigation" markdown>
+**Next:** [Integration boundaries](integrations.md)
 </nav>