README.md: Update README with FMC_SDRAM project introduction

- Added a new project FMC_SDRAM to the project introduction table.

Signed-off-by: Huang Rui <[email protected]>

README.md

@@ -9,6 +9,7 @@ projects.
 |                 PROJECT                  |          INTRODUCTION          |
 | ---------------------------------------- | ------------------------------ |
 | [FMC_BASIC_PERI](./fmc_basic_peripheral) | JTAG, UART, GPIO, USB, I3C FMC |
+| [FMC_SDRAM](./fmc_sdraml)                | FMC of SDRAM and JTAG          |
 
 ## PMOD