chore: correct spelling of frequencyPenalty on google builders

Signed-off-by: Gareth Evans <gareth@bryncynfelin.co.uk>

Author: garethjevans

.gitignore

@@ -29,7 +29,7 @@ out
 
 vscode
 settings.json
-
+CLAUDE.md
 node
 node_modules
 package-lock.json

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

@@ -403,7 +403,7 @@ public Builder topK(Integer topK) {
 			return this;
 		}
 
-		public Builder frequencePenalty(Double frequencyPenalty) {
+		public Builder frequencyPenalty(Double frequencyPenalty) {
 			this.options.setFrequencyPenalty(frequencyPenalty);
 			return this;
 		}

models/spring-ai-vertex-ai-gemini/src/test/java/org/springframework/ai/vertexai/gemini/CreateGeminiRequestTests.java

@@ -86,7 +86,7 @@ public void createRequestWithFrequencyAndPresencePenalty() {
 			.vertexAI(this.vertexAI)
 			.defaultOptions(VertexAiGeminiChatOptions.builder()
 				.model("DEFAULT_MODEL")
-				.frequencePenalty(.25)
+				.frequencyPenalty(.25)
 				.presencePenalty(.75)
 				.build())
 			.build();