split towncrier fragments by new steps

.github/pull_request_template.md

@@ -84,7 +84,11 @@ This PR addresses ...
 - ``changes/<PR#>.tweakreg.rst``
 - ``changes/<PR#>.skymatch.rst``
 - ``changes/<PR#>.exp_to_source.rst``
-- ``changes/<PR#>.outlier_detection.rst``
+- ``changes/<PR#>.outlier_detection_coron.rst``
+- ``changes/<PR#>.outlier_detection_ifu.rst``
+- ``changes/<PR#>.outlier_detection_imaging.rst``
+- ``changes/<PR#>.outlier_detection_spec.rst``
+- ``changes/<PR#>.outlier_detection_tso.rst``
 - ``changes/<PR#>.tso_photometry.rst``
 - ``changes/<PR#>.stack_refs.rst``
 - ``changes/<PR#>.align_refs.rst``

pyproject.toml

@@ -541,8 +541,28 @@ name = "nsclean (spec2 IFU, spec2 MOS)"
 showcontent = true
 
 [[tool.towncrier.type]]
-directory = "outlier_detection"
-name = 'outlier_detection (image3, tso3, spec3, coron3)'
+directory = "outlier_detection_coron"
+name = 'outlier_detection_coron (coron3)'
+showcontent = true
+
+[[tool.towncrier.type]]
+directory = "outlier_detection_ifu"
+name = 'outlier_detection_ifu (spec3)'
+showcontent = true
+
+[[tool.towncrier.type]]
+directory = "outlier_detection_imaging"
+name = 'outlier_detection_imaging (image3)'
+showcontent = true
+
+[[tool.towncrier.type]]
+directory = "outlier_detection_spec"
+name = 'outlier_detection_spec (spec3)'
+showcontent = true
+
+[[tool.towncrier.type]]
+directory = "outlier_detection_tso"
+name = 'outlier_detection_tso (tso3)'
 showcontent = true
 
 [[tool.towncrier.type]]