General: Update seg mask assay docs

docs/segmentation-mask/current/index.md

@@ -7,17 +7,21 @@ exclude_from_index: False
 layout: default
 
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+Prepare your metadata based on the latest metadata schema using one of the template files below. See the instructions in the [Metadata Validation Workflow](https://docs.google.com/document/d/1lfgiDGbyO4K4Hz1FMsJjmJd9RdwjShtJqFYNwKpbcZY) document for more information on preparing and validating your metadata.tsv file prior to submission.
 
 Related files:
 
-Excel and TSV templates for this schema will be available when the draft next-generation schema, to be used in all future submissions, is finalized (no later than Sept. 30).
+
+- [📝 Excel template](https://raw.githubusercontent.com/hubmapconsortium/dataset-metadata-spreadsheet/main/segmentation-mask/latest/segmentation-mask.xlsx): For metadata entry.
+- [📝 TSV template](https://raw.githubusercontent.com/hubmapconsortium/dataset-metadata-spreadsheet/main/segmentation-mask/latest/segmentation-mask.tsv): Alternative for metadata entry.
+
 
 For additional documentation on Segmentation Masks, please visit [here](https://docs.google.com/document/d/1TSQon8nTIoyA5bEKxd8IAKYO6nsDabGbbQ8uKN1gj4E).
 
 ## Metadata schema
 
 
-<summary><a href="https://docs.google.com/spreadsheets/d/1sMMyKtrxD_PO4TVj0JhOpeLF0fRYe2Fjmxnhp-fNzdM"><b>Version 2 (use this one)</b> (draft - submission of data prepared using this schema will be supported by Sept. 30)</a></summary>
+<summary><a href="https://openview.metadatacenter.org/templates/https:%2F%2Frepo.metadatacenter.org%2Ftemplates%2F271bdcd3-b4ac-48e0-ac0f-d666652988af"><b>Version 2 (use this one)</b></a></summary>