Fix small typo in doc for X509_STORE_CTX_new

CLA: trivial
Reviewed-by: NMatthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
Reviewed-by: NRichard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/9894)

(cherry picked from commit 64c1e74572f16a3e7c225f66fe85a3451ad39e68)

doc/man3/X509_STORE_CTX_new.pod

@@ -28,7 +28,7 @@ X509_STORE_CTX_verify_fn
  void X509_STORE_CTX_set0_trusted_stack(X509_STORE_CTX *ctx, STACK_OF(X509) *sk);
 
  void X509_STORE_CTX_set_cert(X509_STORE_CTX *ctx, X509 *x);
- STACK_OF(X509) *X509_STORE_CTX_get0_chain(X609_STORE_CTX *ctx);
+ STACK_OF(X509) *X509_STORE_CTX_get0_chain(X509_STORE_CTX *ctx);
  void X509_STORE_CTX_set0_verified_chain(X509_STORE_CTX *ctx, STACK_OF(X509) *chain);
  void X509_STORE_CTX_set0_crls(X509_STORE_CTX *ctx, STACK_OF(X509_CRL) *sk);