Update pymongocrypt requirement from <2.0.0,>=1.13.0 to >=1.18.1,<2.0.0 (#2958)

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Author: dependabot[bot]

requirements/encryption.txt

@@ -1,3 +1,3 @@
 pymongo-auth-aws>=1.3.0,<2.0.0
-pymongocrypt>=1.13.0,<2.0.0
+pymongocrypt>=1.18.1,<2.0.0
 certifi>=2023.7.22;os.name=='nt' or sys_platform=='darwin'