Fix singelton/singleton typo

Author: tcompa

src/fractal_helper_tasks/__FRACTAL_MANIFEST__.json

@@ -7,7 +7,7 @@
         "has_t": false
       },
       "tags": [
-        "Singelton time dimension"
+        "Singleton time dimension"
       ],
       "executable_non_parallel": "drop_t_dimension.py",
       "meta_non_parallel": {

src/fractal_helper_tasks/dev/task_list.py

@@ -8,7 +8,7 @@
         executable="drop_t_dimension.py",
         meta={"cpus_per_task": 2, "mem": 8000},
         output_types=dict(has_t=False),
-        tags=["Singelton time dimension"],
+        tags=["Singleton time dimension"],
     ),
     ParallelTask(
         input_types=dict(is_3D=False),

src/fractal_helper_tasks/drop_t_dimension.py

@@ -5,7 +5,7 @@
 #
 # This file is derived from a Fractal task core task developed by
 # Tommaso Comparin & Marco Franzon
-"""Task to remove singelton T dimension from an OME-Zarr."""
+"""Task to remove singleton T dimension from an OME-Zarr."""
 
 import logging
 from typing import Any