Restore Meiji start date to avoid conflict with unicode-org#4610 (CLDR-11375)

Author: li-dian-dian

common/supplemental/supplementalData.xml

@@ -4528,7 +4528,7 @@ XXX Code for transations where no currency is involved
               <era type="229" start="1861-3-29"/>
               <era type="230" start="1864-3-27"/>
               <era type="231" start="1865-5-1"/>
-              <era type="232" start="1868-1-25" code="meiji"/>
+              <era type="232" start="1868-9-8" code="meiji"/>
               <era type="233" start="1912-7-30" code="taisho"/>
               <era type="234" start="1926-12-25" code="showa"/>
               <era type="235" start="1989-1-8" code="heisei"/>