Add jdk.java.net/25 to linkchecker ignore list to fix 429 error

Co-authored-by: commjoen <[email protected]>

Author: Copilot

.lycheeignore

@@ -27,3 +27,6 @@ https://www.vaultproject.io/*
 
 # Oracle Java downloads page may not have Java 25 anchor yet
 https://www.oracle.com/java/technologies/downloads/#java25
+
+# jdk.java.net may be rate-limited and cause 429 errors
+https://jdk.java.net/25/