chore(deps): bump org.postgresql:postgresql in /samples/spring-ai-agent #3235

Job	Run time
build-infra	47s
build-backoffice	27s
build-thread-dump-lambda	23s
Build samples/spring-cloud-function-demo	27s
Build apps/java-spring-ai-agents/aiagent	26s
Build apps/aiagent	31s
Build samples/security/apikey/weather	34s
Build apps/aiagent-agentcore/backoffice/trip	29s
Build apps/unicorn-spring-ai-agent	24s
Build apps/ai-jvm-analyzer	32s
Build apps/unicorn-store-spring	1m 9s
Build apps/java-spring-ai-agents/currency	24s
Build samples/quality-assurance/ai-agent	55s
Build samples/security/oauth/authorization-server	39s
Build apps/aiagent-agentcore/aiagent	43s
Build samples/security/oauth/weather	34s
Build samples/spring-ai-agent	33s
Build samples/security/apikey/ai-agent	29s
Build samples/spring-ai-simple-chat-client	27s
Build samples/security/oauth/ai-agent	1m 16s
Build apps/aiagent-agentcore/currency	17s
Build samples/quality-assurance/weather	23s
	12m 49s

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