Update the wallpaper even if the image file already exists

.local/bin/get-nasa-apod

@@ -23,16 +23,16 @@ outfile="${WALLPAPERS}/${filename}"
 
 if [ -f "${outfile}" ]; then
     echo "Target file already exists"
-    exit 0
+else
+    tempfile="$(mktemp)"
+    curl \
+        --location \
+        --output "${tempfile}" \
+        --silent \
+        "${picture_url}"
+    mv "${tempfile}" "${outfile}"
 fi
 
-tempfile="$(mktemp)"
-curl \
-    --location \
-    --output "${tempfile}" \
-    --silent \
-    "${picture_url}"
-mv "${tempfile}" "${outfile}"
 ln \
     --force \
     --symbolic \