Fix error in LHASH documentation

Reviewed-by: Hugo Landau <hlandau@openssl.org>
Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/18859)

doc/man3/OPENSSL_LH_COMPFUNC.pod

@@ -30,7 +30,7 @@ OPENSSL_LH_doall, OPENSSL_LH_doall_arg, OPENSSL_LH_error
 
  TYPE *lh_TYPE_insert(LHASH_OF(TYPE) *table, TYPE *data);
  TYPE *lh_TYPE_delete(LHASH_OF(TYPE) *table, TYPE *data);
- TYPE *lh_retrieve(LHASH_OF(TYPE) *table, TYPE *data);
+ TYPE *lh_TYPE_retrieve(LHASH_OF(TYPE) *table, TYPE *data);
 
  void lh_TYPE_doall(LHASH_OF(TYPE) *table, OPENSSL_LH_DOALL_FUNC func);
  void lh_TYPE_doall_arg(LHASH_OF(TYPE) *table, OPENSSL_LH_DOALL_FUNCARG func,