fix LC encoding diagram (#414)

the old RV32 encoding was left in the diagram
Only the RV64 remains now, which matches the riscv-opcodes PR

Author: tariqkurd-repo

src/insns/wavedrom/loadcap.adoc

@@ -3,7 +3,7 @@
 [wavedrom, ,svg]
 ....
 {reg: [
-  {bits: 7,  name: 'opcode',    attr: ['7', 'MISCMEM=0001111','LOAD=0000011',], type: 8},
+  {bits: 7,  name: 'opcode',    attr: ['7', 'MISCMEM=0001111'], type: 8},
   {bits: 5,  name: 'cd',        attr: ['5', 'dest'], type: 2},
   {bits: 3,  name: 'funct3',    attr: ['3', 'LC=100'], type: 8},
   {bits: 5,  name: 'rs1/cs1',   attr: ['5', 'base'], type: 4},