fix: relax boto3/botocore upper-bound pin to avoid dependency conflicts

The <1.38 ceiling was stale and started conflicting with other Home
Assistant integrations (e.g. LLM Vision) that require a newer boto3
with no upper bound, causing HA's requirements installer to fail
setup entirely with RequirementsNotFound for any integration that
depends on this package. The AWS Cognito IdP auth calls this library
relies on (InitiateAuth/RespondToAuthChallenge) are stable across
boto3/botocore versions, so there's no need to cap it.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Author: nsleigh

pyproject.toml

@@ -25,8 +25,8 @@ classifiers = [
     "Topic :: Software Development :: Libraries :: Python Modules",
 ]
 dependencies = [
-    "boto3>=1.34,<1.38",
-    "botocore>=1.34,<1.38",
+    "boto3>=1.34",
+    "botocore>=1.34",
     "requests",
     "aiohttp",
     "pyquery",