Add 1.21.1 to doc

Author: levonet

README.md

@@ -183,7 +183,8 @@ Select patch
 | 1.15.2           | YES | [proxy_connect_rewrite_1015.patch](patch/proxy_connect_rewrite_1015.patch) |
 | 1.15.4 ~ 1.16.x  | YES | [proxy_connect_rewrite_101504.patch](patch/proxy_connect_rewrite_101504.patch) |
 | 1.17.x ~ 1.18.0  | YES | [proxy_connect_rewrite_1018.patch](patch/proxy_connect_rewrite_1018.patch) |
-| 1.19.x           | YES | [proxy_connect_rewrite_1018.patch](patch/proxy_connect_rewrite_1018.patch) |
+| 1.19.x ~ 1.21.0  | YES | [proxy_connect_rewrite_1018.patch](patch/proxy_connect_rewrite_1018.patch) |
+| 1.21.1           | YES | [proxy_connect_rewrite_1018.patch](patch/proxy_connect_rewrite_102101.patch) |
 
 | OpenResty version | enable REWRITE phase | patch |
 | --: | --: | --: |
@@ -192,6 +193,7 @@ Select patch
 | 1.15.8 | YES | [proxy_connect_rewrite_101504.patch](patch/proxy_connect_rewrite_101504.patch) |
 | 1.17.8 | YES | [proxy_connect_rewrite_1018.patch](patch/proxy_connect_rewrite_1018.patch) |
 | 1.19.3 | YES | [proxy_connect_rewrite_1018.patch](patch/proxy_connect_rewrite_1018.patch) |
+| 1.21.1 | YES | [proxy_connect_rewrite_1018.patch](patch/proxy_connect_rewrite_102101.patch) |
 
 * `proxy_connect_<VERSION>.patch` disables nginx REWRITE phase for CONNECT request by default, which means `if`, `set`, `rewrite_by_lua` and other REWRITE phase directives cannot be used.
 * `proxy_connect_rewrite_<VERSION>.patch` enables these REWRITE phase directives.