Fix mongoose docs generation

PUBLISHED_FROM=331821dcd1f7dc8a94581cd8a9b51aa00a89fddc

docs/c-api/mg_util.h/mg_stat.md

@@ -0,0 +1,14 @@
+---
+title: "mg_stat()"
+decl_name: "mg_stat"
+symbol_kind: "func"
+signature: |
+  int mg_stat(const char *path, cs_stat_t *st);
+---
+
+Performs a 64-bit `stat()` call against a given file.
+
+`path` should be UTF8 encoded.
+
+Return value is the same as for `stat()` syscall. 
+