Fix odd compilation error on newer Rust

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "gemfreely"
-version = "0.1.7"
+version = "0.1.8"
 edition = "2021"
 license = "AGPL-3.0-or-later"
 description = "Synchronize Gemini protocol blogs to the Fediverse"

src/gemfeed.rs

@@ -146,7 +146,11 @@ impl Gemfeed {
         settings: &GemfeedParserSettings,
     ) -> Result<Gemfeed> {
         if let Some(content) = resp.content() {
-            let feed = content.parse::<AtomFeed>()?;
+            let feed = match content.parse::<AtomFeed>() {
+                Ok(feed) => feed,
+                Err(_) => return Err(anyhow!("Could not parse Atom feed")),
+            };
+
             let entries = parse_atom(&feed, settings)?;
             let title = feed.title();
             Ok(Self::new(url, title, entries))
@@ -245,7 +249,7 @@ impl GemfeedEntry {
             slug: self.slug,
             published: self.published,
             url: self.url,
-            body: OnceCell::from(body)
+            body: OnceCell::from(body),
         }
     }