fix(mps-parser): explictly request non-free-threaded build

Author: gforsyth

conda/recipes/mps-parser/recipe.yaml

@@ -1,4 +1,4 @@
-# SPDX-FileCopyrightText: Copyright (c) 2025, NVIDIA CORPORATION.
+# SPDX-FileCopyrightText: Copyright (c) 2025-2026, NVIDIA CORPORATION.
 # SPDX-License-Identifier: Apache-2.0
 schema_version: 1
 
@@ -41,7 +41,10 @@ requirements:
     - cython >=3.0.0
     - libmps-parser =${{ version }}
     - pip
-    - python =${{ py_version }}
+    # Request Python with a buildstring where the end of the string exactly
+    # matches `py_buildstring`, e.g. `314`
+    # to exclude free-threaded builds
+    - python =${{ py_version }}=*${{ py_buildstring }}
     - rapids-build-backend >=0.4.0,<0.5.0
     - scikit-build-core >=0.11.0
   run: