Make chromadb_rm compatible with openai 0.28

Author: DanielUH2019

dspy/retrieve/chromadb_rm.py

@@ -8,6 +8,12 @@
 import backoff
 from dsp.utils import dotdict
 
+try:
+    import openai.error
+    ERRORS = (openai.error.RateLimitError, openai.error.ServiceUnavailableError, openai.error.APIError)
+except Exception:
+    ERRORS = (openai.RateLimitError, openai.APIError)
+
 try:
     import chromadb
     from chromadb.config import Settings
@@ -108,7 +114,7 @@ def _init_chromadb(
 
     @backoff.on_exception(
         backoff.expo,
-        (openai.RateLimitError),
+        ERRORS,
         max_time=15,
     )
     def _get_embeddings(self, queries: List[str]) -> List[List[float]]: