make torch 2.2.2 pin explicit

requirements/common-constraints.txt

@@ -478,7 +478,9 @@ tokenizers==0.21.0
 toml==0.10.2
     # via streamlit
 torch==2.2.2
-    # via sentence-transformers
+    # via
+    #   -r requirements/requirements-help.in
+    #   sentence-transformers
 tornado==6.4.2
     # via streamlit
 tqdm==4.67.1

requirements/requirements-help.in

@@ -3,3 +3,7 @@ llama-index-embeddings-huggingface
 
 # Because sentence-transformers doesn't like >=2
 numpy<2
+
+# Mac x86 only supports 2.2.2
+# https://discuss.pytorch.org/t/why-no-macosx-x86-64-build-after-torch-2-2-2-cp39-none-macosx-10-9-x86-64-whl/204546/2
+torch==2.2.2

requirements/requirements-help.txt

@@ -253,6 +253,7 @@ tokenizers==0.21.0
 torch==2.2.2
     # via
     #   -c requirements/common-constraints.txt
+    #   -r requirements/requirements-help.in
     #   sentence-transformers
 tqdm==4.67.1
     # via