[nautilus] tracker-search: fix datetime format

[António Fernandes <antoniof src gnome org>]

commit 0503af3d225c1556f22f561c8d4e80308910fbdf
Author: Nishit Patel <nishitlimbani130 gmail com>
Date:   Thu Jul 29 13:59:48 2021 +0530

    tracker-search: fix datetime format
    
    use `g_date_time_format_iso8601` to properly format
    datetime as SPARQL only accepts ISO8601 format
    
    fixes #1933

 src/nautilus-search-engine-tracker.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/nautilus-search-engine-tracker.c b/src/nautilus-search-engine-tracker.c
index a23ff6f40..a3e20b6dd 100644
--- a/src/nautilus-search-engine-tracker.c
+++ b/src/nautilus-search-engine-tracker.c
@@ -419,8 +419,8 @@ nautilus_search_engine_tracker_start (NautilusSearchProvider *provider)
         shifted_end_date = g_date_time_add_days (end_date, 1);
 
         type = nautilus_query_get_search_type (tracker->query);
-        initial_date_format = g_date_time_format (initial_date, "%Y-%m-%dT%H:%M:%S");
-        end_date_format = g_date_time_format (shifted_end_date, "%Y-%m-%dT%H:%M:%S");
+        initial_date_format = g_date_time_format_iso8601 (initial_date);
+        end_date_format = g_date_time_format_iso8601 (shifted_end_date);
 
         g_string_append (sparql, " && ");