Update 'README.md'

README.md

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-# guides
+# Guides
 
-Encountering problem after problem... and then solving it.
+Encountering problem after problem... and then solving it.
+
+# Index
+[Installing Windows 11 to nvmE/m.2 SSD from Linux](https://tea.cubes.link/cube/guides/src/branch/master/Installing%20Windows%20on%20a%20m.2%20SSD%20with%20Linux.md)