Remediate dataset card (tools/check_card_snippets.py)

README.md

@@ -177,3 +177,7 @@ Anisotropy in the Cosmic Microwave Background Radiation,” ApJ 456, L71
 Statistical Comparison of MSAM1-94 to MSAM1-92” (1997); and Cheng et al.,
 “Detection of Cosmic Microwave Background Anisotropy by the Third Flight of
 MSAM,” ApJ 488, L59 (1997).
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+## Errata and requests
+
+Report corrections or dataset requests in the dataset's Community tab.