fixed typo in comment of instruction definition

wnienhaus · wnienhaus · commit 15633eb7803d · 2021-08-02T18:15:22.000+03:00
diff --git a/esp32_ulp/opcodes.py b/esp32_ulp/opcodes.py
@@ -112,7 +112,7 @@ def make_ins(layout):
     unused : 8      # Unused
     low : 5         # Low bit
     high : 5        # High bit
-    opcode : 4      # Opcode (OPCODE_WR_REG)
+    opcode : 4      # Opcode (OPCODE_RD_REG)
 """)
 
 
