update database

initdb.d/27-freq.sql

@@ -4,4 +4,7 @@ CREATE TABLE "frequency" (
   PRIMARY KEY ("entry")
 );
 
-CREATE INDEX "idx_frequency_frequency" ON "frequency"("frequency");
+CREATE INDEX "idx_frequency_frequency" ON "frequency" ("frequency");
+CREATE INDEX "idx_frequency_entry" ON "frequency"
+  USING pgroonga("entry")
+  WITH (normalizer='NormalizerNFKC100("unify_kana", true)');