fixed alt text

README.md

@@ -162,17 +162,21 @@ And this is the output you'll get if you run this program:
 <img src="https://raw.githubusercontent.com/zkat/miette/main/images/single-line-example.png" alt="
 Narratable printout:
 \
-Error: Types mismatched for operation.
+diagnostic error code: oops::my::bad (link)
-    Diagnostic severity: error
+Error: oops!
-Begin snippet starting at line 1, column 1
 \
-snippet line 1: 3 + &quot;5&quot;
+Begin snippet for bad_file.rs starting
-    label starting at line 1, column 1: int
+at line 2, column 3
-    label starting at line 1, column 1: doesn't support these values.
+\
-    label starting at line 1, column 1: string
+snippet line 1: source
-diagnostic help: Change int or string to be the right types and try again.
+
-diagnostic code: nu::parser::unsupported_operation
+\
-For more details, see https://docs.rs/nu-parser/0.1.0/nu-parser/enum.ParseError.html#variant.UnsupportedOperation">
+snippet line 2:  text
+    highlight starting at line 1, column 3: This bit here
+\
+snippet line 3: here
+\
+diagnostic help: try doing it better next time?">
 
 ### Using