add user-agent header to all requests

Author: 2bndy5

cpp-linter/src/rest_api/github/mod.rs

@@ -100,6 +100,7 @@ impl RestApiClient for GithubApiClient {
             "Accept",
             HeaderValue::from_str("application/vnd.github.raw+json")?,
         );
+        headers.insert("User-Agent", HeaderValue::from_str("cpp-linter/cpp_linter_rs")?);
         // headers.insert("User-Agent", USER_AGENT.parse().unwrap());
         if let Ok(token) = env::var("GITHUB_TOKEN") {
             let mut val = HeaderValue::from_str(token.as_str())?;