gh-38556: Revert cysignals build constraint
    
Reverts 95428a1c31939d8159fbce8f
b0384fa26f0470fe which broke the conda ci.

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URL: #38556
Reported by: Tobias Diez
Reviewer(s): Dima Pasechnik

Author: Release Manager

src/pyproject.toml

@@ -7,7 +7,7 @@ requires = [
     # version constraint for macOS Big Sur support (see https://github.com/sagemath/sage/issues/31050)
     'wheel >=0.36.2',
     'cypari2 >=2.1.1',
-    'cysignals >=1.11.4',
+    'cysignals >=1.10.2',
     # Exclude 3.0.3 because of https://github.com/cython/cython/issues/5748
     'cython >=3.0, != 3.0.3, <4.0',
     'gmpy2 ~=2.1.b999',