[clang] Fix Typo on cindex.py (llvm#92945)

Co-authored-by: Thomas Applencourt <[email protected]>

Author: TApplencourt

clang/bindings/python/clang/cindex.py

@@ -3015,7 +3015,7 @@ class _CXUnsavedFile(Structure):
 
 
 # Functions calls through the python interface are rather slow. Fortunately,
-# for most symboles, we do not need to perform a function call. Their spelling
+# for most symbols, we do not need to perform a function call. Their spelling
 # never changes and is consequently provided by this spelling cache.
 SPELLING_CACHE = {
     # 0: CompletionChunk.Kind("Optional"),