Fix pulling spectre submodule line

pull_submodules.sh

@@ -2,4 +2,4 @@
 git submodule update --init external/emonet
 git submodule update --init external/SwinTransformer
 git submodule update --init external/face-parsing.PyTorch
-git submodule update --init --recursive external/external/spectre
+git submodule update --init --recursive external/spectre