chore: update google-genai version to 1.44.0

PiperOrigin-RevId: 889240232

Author: google-genai-bot

pom.xml

@@ -51,7 +51,7 @@
     <otel.version>1.51.0</otel.version>
     <mcp.version>0.17.2</mcp.version>
     <errorprone.version>2.47.0</errorprone.version>
-    <google.genai.version>1.43.0</google.genai.version>
+    <google.genai.version>1.44.0</google.genai.version>
     <protobuf.version>4.33.5</protobuf.version>
     <junit.version>5.11.4</junit.version>
     <mockito.version>5.20.0</mockito.version>