Fix 2

server.py

@@ -100,6 +100,7 @@ async def search_specs(keywords: str, limit: int, release: str = None, wg: str =
     """
     Search 3GPP specifications only by their keywords [note that it will only work with keywords](and some filters [see kwargs field])
     Arguments available: keywords: string [mandatory, separated by space], limit [mandatory, default = 5], release: string [optional, filter] (the release version (e.g. 18, 9, 19, ...), generally the first number of the full version), wg: string [optional, filter] = working group (S1, C4, SP, ...), spec_type: string [optional, filter] (either TS or TR), mode [mandatory, default = 'and'] = search mode (and = all keywords must be in the search, or = at least one keyword in the search)
+    Do not include null parameters into the POST body
     """
     endpoint = DOC3GPPFINDER_BASE + "/search-spec"
     body = {