update metadata for patch release 1.20.1

Author: zacharyburnett

CHANGES.rst

@@ -1,3 +1,14 @@
+1.20.1 (2025-10-20)
+===================
+
+source_catalog (image3)
+-----------------------
+
+- Fix a bug where fluxes were not being converted from Mjy/sr to Jy.
+  Fix a bug where fluxes included background flux when they shouldn't. (`#9939
+  <https://github.com/spacetelescope/jwst/issues/9939>`_)
+
+
 1.20.0 (2025-09-23)
 ===================
 

README.md

@@ -263,7 +263,8 @@ the specified context and less than the context for the next release.
 
 | jwst tag            | DMS build | SDP_VER  | CRDS_CONTEXT | Released   | Ops Install | Notes                                         |
 |---------------------|-----------|----------|--------------|------------|-------------|-----------------------------------------------|
-| 1.20.0              | B12.0.3   | 2025.4.0 | 1439         | 2025-09-23 |             | First release candidate for B12.0.3           |
+| 1.20.1              | B12.1     | 2025.4.0 | 1439         | 2025-10-20 |             | Patch release for B12.1                       |
+| 1.20.0              | B12.1     | 2025.4.0 | 1439         | 2025-09-23 |             | First release candidate for B12.1             |
 | 1.19.2              | B12.0.2   | 2025.3.0 | 1408         | 2025-09-11 |             | Patch release for B12.0.2                     |
 | 1.19.1              | B12.0.1   | 2025.3.0 | 1408         | 2025-07-21 |             | Patch release for B12.0.1                     |
 | 1.19.0              | B12.0     | 2025.3.0 | 1408         | 2025-06-26 |             | First release candidate for B12.0             |