Fix the title of the latest C API document. (#134)

Signed-off-by: YiYing He <[email protected]>

Author: q82419

.env

@@ -1 +1 @@
-WASMEDGE_VERSION='0.13.0'
+WASMEDGE_VERSION='0.13.1'

docs/embed/c/reference/latest.md

@@ -2,7 +2,7 @@
 sidebar_position: 1
 ---
 
-# C API {{ wasmedge_version }} Documentation
+# C API 0.13.1 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 `{{ wasmedge_version }}`. The following are the guides to working with the C APIs of WasmEdge.