Record the exact source artifact and revision in NOTICE

NOTICE

@@ -1,9 +1,14 @@
-LibreSAM weights
-----------------
-
-This product contains weights from Segment Anything (SAM)
-(https://github.com/facebookresearch/segment-anything).
-Copyright (c) Meta Platforms, Inc. and affiliates.
-Licensed under the Apache License, Version 2.0.
-
-The weights are redistributed unmodified.
+LibreSAM weights
+----------------
+
+This product contains weights from Segment Anything (SAM)
+(https://github.com/facebookresearch/segment-anything).
+Copyright (c) Meta Platforms, Inc. and affiliates.
+Licensed under the Apache License, Version 2.0.
+
+Source artifact:  https://huggingface.co/facebook/sam-vit-huge
+Source revision:  87aecf0df4ce6b30cd7de76e87673c49644bdf67
+Source files:     config.json, preprocessor_config.json, model.safetensors
+Modification:     none. The weights and configuration are redistributed
+                  unmodified. Upstream's pytorch_model.bin (a duplicate of the
+                  safetensors weights) and tf_model.h5 are not mirrored.