subtract 1ms from datetime query param end to prevent inlcusion of data from following day

Author: wschoors

titiler/stacapi/factory.py

@@ -811,7 +811,7 @@ def get_tile(  # noqa: C901
                 )
 
             ###########################################################
-            # STAC Query parameter provided by the the render extension and QueryParameters
+            # STAC Query parameter provided by the render extension and QueryParameters
             ###########################################################
             query_params = copy(layer.get("render")) or {}
 
@@ -820,7 +820,11 @@ def get_tile(  # noqa: C901
                     req_time,
                     "%Y-%m-%d",
                 ).replace(tzinfo=python_datetime.timezone.utc)
-                end_datetime = start_datetime + python_datetime.timedelta(days=1)
+                end_datetime = (
+                    start_datetime
+                    + python_datetime.timedelta(days=1)
+                    - python_datetime.timedelta(milliseconds=1)
+                )
 
                 query_params[
                     "datetime"