Temporary fix for meson/conda for PR 39036 (and also retrigger the build)

Author: user202729

src/sage/schemes/elliptic_curves/meson.build

@@ -1,6 +1,7 @@
 py.install_sources(
   'BSD.py',
   'Qcurves.py',
+  'addition_formulas_ring.py',
   'all.py',
   'cardinality.py',
   'cm.py',