docs: update C API docs to 0.16.1

Signed-off-by: YiYing He <yiying@secondstate.io>

Author: q82419

.env

@@ -1,2 +1,2 @@
-WASMEDGE_VERSION='0.14.1'
+WASMEDGE_VERSION='0.16.1'
 WASMEDGE_GO_VERSION='0.14.0'

docs/embed/c/intro.md

@@ -121,7 +121,9 @@ sys 0m0.011s
 
 ## API References
 
-- [0.14.1](reference/latest.md)
+- [0.16.1](reference/latest.md)
+- [0.15.1](reference/0.15.x.md)
+- [0.14.1](reference/0.14.x.md)
 - [0.13.5](reference/0.13.x.md)
 - [0.12.1](reference/0.12.x.md)
 - [0.11.2](reference/0.11.x.md)

docs/embed/c/reference/0.10.x.md

@@ -1,5 +1,5 @@
 ---
-sidebar_position: 9
+sidebar_position: 13
 ---
 
 # C API 0.10.1 Documentation

docs/embed/c/reference/0.11.x.md

@@ -1,5 +1,5 @@
 ---
-sidebar_position: 7
+sidebar_position: 11
 ---
 
 # C API 0.11.2 Documentation

docs/embed/c/reference/0.12.x.md

@@ -1,5 +1,5 @@
 ---
-sidebar_position: 5
+sidebar_position: 9
 ---
 
 # C API 0.12.1 Documentation

docs/embed/c/reference/0.13.x.md

@@ -1,11 +1,13 @@
 ---
-sidebar_position: 3
+sidebar_position: 7
 ---
 
 # C API 0.13.5 Documentation
 
 [WasmEdge C API](https://github.com/WasmEdge/WasmEdge/blob/master/include/api/wasmedge/wasmedge.h) denotes an interface to access the WasmEdge runtime at version `0.13.5`. The following are the guides to working with the C APIs of WasmEdge.
 
+**Developers can refer to [here to upgrade to v0.14.0](upgrade_to_0.14.0).**
+
 ## WasmEdge Installation
 
 ### Download And Install