fix: correct name typo from 'asigned' to 'assigned'

Signed-off-by: Changho Kim <[email protected]>

Author: xion-chokim

models/spring-ai-vertex-ai-gemini/src/main/java/org/springframework/ai/vertexai/gemini/VertexAiGeminiChatModel.java

@@ -547,7 +547,7 @@ public Flux<ChatResponse> internalStream(Prompt prompt, ChatResponse previousCha
 
 	protected List<Generation> responseCandidateToGeneration(Candidate candidate) {
 
-		// TODO - The candidateIndex (e.g. choice must be asigned to the generation).
+		// TODO - The candidateIndex (e.g. choice must be assigned to the generation).
 		int candidateIndex = candidate.getIndex();
 		FinishReason candidateFinishReason = candidate.getFinishReason();