Update dependencies and fix error handling in HTTP GET request

src/main.rs

@@ -760,7 +760,7 @@ fn run_certdata_fetch(args: CertdataFetchArgs) -> Result<()> {
 fn http_get_text(client: &reqwest::blocking::Client, url: &str) -> Result<String> {
     let response = match client.get(url).send() {
         Ok(response) => response,
-        Err(err) if is_mozilla_hg_url(url) => {
+        Err(_err) if is_mozilla_hg_url(url) => {
             println!("reqwest fetch failed for Mozilla hg URL; retrying via openssl.");
             return openssl_https_get_text(url);
         }