local_data_file(): Update XDG file not found error message

The "error" prefix caused a redundant message on the console:

    error: error getting XDG data path

1 files changed, 1 insertions, 1 deletions

diff --git a/src/main.rs b/src/main.rs
index f8b7d26..50bc2ed 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -220,7 +220,7 @@ fn local_data_file<P: AsRef<Path>>(file: P) -> anyhow::Result<PathBuf> {
 
     Ok(
         xdg_dirs.find_data_file(&file)
-            .ok_or(anyhow::anyhow!("error getting XDG data path"))?
+            .ok_or(anyhow::anyhow!("unable to get XDG data path"))?
     )
 }