apm: Fix typo in cipher name (#4977)

(cherry picked from commit 13d7339)

Author: carsonip

docs/en/observability/apm/shared-ssl-config.asciidoc

@@ -85,7 +85,7 @@ The following cipher suites are available:
 | ECDHE-RSA-AES-128-GCM-SHA256 | TLS 1.2 only.
 | ECDHE-RSA-AES-256-CBC-SHA |
 | ECDHE-RSA-AES-256-GCM-SHA384 | TLS 1.2 only.
-| ECDHE-RSA-CHACHA20-POLY1205 | TLS 1.2 only.
+| ECDHE-RSA-CHACHA20-POLY1305 | TLS 1.2 only.
 | ECDHE-RSA-RC4-128-SHA | Disabled by default. RC4 not recommended.
 | RSA-3DES-CBC3-SHA |
 | RSA-AES-128-CBC-SHA |