fmcomms2: Update project doc

Signed-off-by: sarpadi <sergiu.arpadi@analog.com>

Author: sarpadi

docs/projects/fmcomms2/index.rst

@@ -62,7 +62,7 @@ Supported carriers
      - :xilinx:`KCU105`
      - FMC LPC
    * -
-     - :xilinx:`VC707`
+     - :xilinx:`VC707` *
      - FMC HPC1
    * -
      - :xilinx:`ZC702`
@@ -77,6 +77,12 @@ Supported carriers
      - `ZedBoard <https://digilent.com/shop/zedboard-zynq-7000-arm-fpga-soc-development-board>`__
      - FMC LPC
 
+.. admonition:: Legend
+   :class: note
+
+   - ``*`` removed; last release that supports this project on this carrier is
+      :git-hdl:`hdl_2023_r2 <hdl_2023_r2:projects/fmcomms2/vc707>`
+
 Block design
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