fix: correct typo in Pipeline.load() docstring (#11632)

Author: Kunal-Somani

haystack/core/pipeline/base.py

@@ -322,7 +322,7 @@ def load(
         callbacks: DeserializationCallbacks | None = None,
     ) -> T:
         """
-        Creates a `Pipeline` object a string representation.
+        Creates a `Pipeline` object from a string representation.
 
         The string representation is read from the file-like object passed in the `fp` argument.