fixup tests

Author: aignas

tests/python/python_tests.bzl

@@ -781,13 +781,13 @@ def _test_single_version_platform_override_errors(env):
             overrides = [
                 _single_version_platform_override(python_version = "3.12", platform = "foo"),
             ],
-            want_error = "The 'python_version' attribute needs to conform to PEP440 versions, got: '3.12'",
+            want_error = "The 'python_version' attribute needs to specify an 'X.Y.Z' semver-compatible version, got: '3.12'",
         ),
         struct(
             overrides = [
                 _single_version_platform_override(python_version = "3.12.1+my_build", platform = "foo"),
             ],
-            want_error = "The 'python_version' attribute needs to specify an 'X.Y.Z' semver-compatible version, got: '3.12.1+my_build'",
+            want_error = "The 'python_version' attribute needs to specify an 'X.Y.Z' semver-compatible version, got: '3.12.1+my.build'",
         ),
     ]:
         errors = []