Include error location in GitHub Action diagnostic messages (#1696)

This ensures that if you look at the GitHub Actions _logs_, you see the
entire message, including the location:

![Screen Shot 2023-01-06 at 3 08 06
PM](https://user-images.githubusercontent.com/1309177/211091772-df6f1deb-c741-435c-be2e-6ee22347a073.png)

The downside is that the location gets repeated inline:

![Screen Shot 2023-01-06 at 3 08 30
PM](https://user-images.githubusercontent.com/1309177/211091800-57020736-95fa-4e41-acb3-eb11c848ba7e.png)

See: #1693.

Author: charliermarsh

src/printer.rs

@@ -223,19 +223,30 @@ impl<'a> Printer<'a> {
                 self.post_text(diagnostics);
             }
             SerializationFormat::Github => {
-                // Generate error workflow command in GitHub Actions format
-                // https://docs.github.com/en/actions/reference/workflow-commands-for-github-actions#setting-an-error-message
+                // Generate error workflow command in GitHub Actions format.
+                // See: https://docs.github.com/en/actions/reference/workflow-commands-for-github-actions#setting-an-error-message
                 diagnostics.messages.iter().for_each(|message| {
+                    let label = format!(
+                        "{}{}{}{}{}{} {} {}",
+                        relativize_path(Path::new(&message.filename)),
+                        ":",
+                        message.location.row(),
+                        ":",
+                        message.location.column(),
+                        ":",
+                        message.kind.code().as_ref(),
+                        message.kind.body(),
+                    );
                     println!(
-                        "::notice title=Ruff,file={},line={},col={},endLine={},endColumn={}::({}) \
-                         {}",
+                        "::error title=Ruff \
+                         ({}),file={},line={},col={},endLine={},endColumn={}::{}",
+                        message.kind.code(),
                         relativize_path(Path::new(&message.filename)),
                         message.location.row(),
                         message.location.column(),
                         message.end_location.row(),
                         message.end_location.column(),
-                        message.kind.code(),
-                        message.kind.body(),
+                        label,
                     );
                 });
             }