[doc] Fix cross link with ICU plugin

Doc bug introduced with #15695

docs/reference/analysis/tokenfilters/cjk-bigram-tokenfilter.asciidoc

@@ -3,7 +3,7 @@
 
 The `cjk_bigram` token filter forms bigrams out of the CJK
 terms that are generated by the <<analysis-standard-tokenizer,`standard` tokenizer>>
-or the `icu_tokenizer` (see <<analysis-icu-plugin>>).
+or the `icu_tokenizer` (see {plugins}/analysis-icu-tokenizer.html[`analysis-icu` plugin]).
 
 By default, when a CJK character has no adjacent characters to form a bigram,
 it is output in unigram form. If you always want to output both unigrams and

docs/reference/analysis/tokenfilters/cjk-width-tokenfilter.asciidoc

@@ -7,6 +7,6 @@ The `cjk_width` token filter normalizes CJK width differences:
 * Folds halfwidth Katakana variants into the equivalent Kana
 
 NOTE: This token filter can be viewed as a subset of NFKC/NFKD
-Unicode normalization.  See the <<analysis-icu-plugin>>
+Unicode normalization.  See the {plugins}/analysis-icu-normalization-charfilter.html[`analysis-icu` plugin]
 for full normalization support.