test: bump google-genai lib version in -oldest test env.

Author: argaj

instrumentation-genai/opentelemetry-instrumentation-google-genai/tests/requirements.oldest.txt

@@ -20,7 +20,7 @@ pytest-asyncio==0.21.0
 pytest-vcr==1.0.2
 
 google-auth==2.15.0
-google-genai==1.0.0
+google-genai==1.32.0
 opentelemetry-api==1.37.0
 opentelemetry-sdk==1.37.0
 opentelemetry-semantic-conventions==0.58b0