chore: fix some typos in comment and logs (#4333)

Signed-off-by: bytesingsong <bytesing@icloud.com>

core/artwork/sources.go

@@ -188,7 +188,7 @@ func fromURL(ctx context.Context, imageUrl *url.URL) (io.ReadCloser, string, err
 	}
 	if resp.StatusCode != http.StatusOK {
 		resp.Body.Close()
-		return nil, "", fmt.Errorf("error retrieveing artwork from %s: %s", imageUrl, resp.Status)
+		return nil, "", fmt.Errorf("error retrieving artwork from %s: %s", imageUrl, resp.Status)
 	}
 	return resp.Body, imageUrl.String(), nil
 }

release/linux/postinstall.sh

@@ -4,7 +4,7 @@
 # the package manager (in particular, deb) thinks that the file exists, while it is 
 # no longer on disk. Specifically, doing a `rm /etc/navidrome/navidrome.toml` 
 # without something like `apt purge navidrome` will result in the system believing that
-# the file still exists. In this case, during isntall it will NOT extract the configuration 
+# the file still exists. In this case, during install it will NOT extract the configuration 
 # file (as to not override it). Since `navidrome service install` depends on this file existing,
 # we will create it with the defaults anyway.
 if [ ! -f /etc/navidrome/navidrome.toml ]; then