pixi.toml: relax deps contrains to allow to use cmake 3.22 exact

Author: ahoarau

pixi.toml

@@ -18,10 +18,10 @@ numpy = ">=1.24.0,<2"       # for python bindings
 nanobind = ">=2.9.2,<3"     # for python bindings
 catch2 = ">=3.8.0,<4"       # for test
 cereal = ">=1.3.2,<2"       # for test
-libmatio = ">=1.5.28,<2"    # for test (maros meszaros)
+libmatio = ">=1.2.0,<2"     # for test (maros meszaros)
 scipy = ">=1.16.3,<2"       # for test
 doxygen = ">=1.13.2,<2"     # for doc
-graphviz = ">=13.1.2,<14"   # for doc
+graphviz = ">=10.0.0,<14"   # for doc
 prek = ">=0.2.21,<0.3"      # for linting
 
 [activation.env]