Fix lychee erroring on root-relative paths

scheme = ["https", "http"] didn't help because lychee fails to build
the URL before the scheme filter runs. Set base = "https://tyk.io" so
root-relative paths (/img/..., /page/...) are resolved to
https://tyk.io/... and then silently skipped by the existing tyk.io
exclude rule, rather than producing "cannot convert path to URI" errors.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: sharadregoti

lychee.toml

@@ -1,13 +1,17 @@
 # Lychee external link checker configuration
 # Docs: https://lychee.cli.rs/usage/configuration/
 
-# Only check http/https URLs — skips root-relative paths (/img/..., /page/...),
-# file paths, mailto:, etc. Internal links are validated by validate-docs.yml.
+# Only check http/https URLs — skips mailto:, file://, etc.
 scheme = ["https", "http"]
 
+# Resolve root-relative links (e.g. /img/..., /page/...) against the live docs
+# base URL. Combined with the tyk.io exclude rule below, these get silently
+# skipped rather than erroring as "cannot convert path to URI".
+base = "https://tyk.io"
+
 # Only check external URLs — internal links are validated by validate-docs.yml
 exclude = [
-  # Tyk-owned domains (covered by internal link checks)
+  # Tyk-owned domains (covers root-relative paths resolved via base above)
   "https?://(.*\\.)?tyk\\.io",
   "https?://(.*\\.)?tyktech\\.net",