fix: use rust raw string literal syntax for quote mark escape

wfassoc-exec/src/runner.rs

@@ -35,7 +35,7 @@ pub enum Error {
     #[error("given extension name {0} is not presented in application")]
     BadExtName(String),
     /// Find star (*) extension name with other extension names when converting extension name to index
-    #[error("wildcard extension name \"*\" is not allowed to be used with other extension names")]
+    #[error(r#"wildcard extension name "*" is not allowed to be used with other extension names"#)]
     ExclusiveStarExtName,
 }