closes bpo-36861: Update Unicode database to 12.1.0. (GH-13214)

Adds ㋿.
diff --git a/Doc/reference/lexical_analysis.rst b/Doc/reference/lexical_analysis.rst
index 13adc1a..1cbe421 100644
--- a/Doc/reference/lexical_analysis.rst
+++ b/Doc/reference/lexical_analysis.rst
@@ -316,7 +316,7 @@
 * *Nd* - decimal numbers
 * *Pc* - connector punctuations
 * *Other_ID_Start* - explicit list of characters in `PropList.txt
-  <http://www.unicode.org/Public/12.0.0/ucd/PropList.txt>`_ to support backwards
+  <http://www.unicode.org/Public/12.1.0/ucd/PropList.txt>`_ to support backwards
   compatibility
 * *Other_ID_Continue* - likewise