Update OllamaEmbeddingEngine.py (#1330)

Compatible private embeddeding model (openai format)

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cognee/infrastructure/databases/vector/embeddings/OllamaEmbeddingEngine.py

@@ -97,6 +97,7 @@ class OllamaEmbeddingEngine(EmbeddingEngine):
         payload = {
             "model": self.model,
             "prompt": prompt,
+            "input": prompt
         }
         headers = {}
         api_key = os.getenv("LLM_API_KEY")