ci: suppress remaining lint warnings (BLKSEQ, UNUSEDPARAM, CASEINCOMPLETE)

BLKSEQ: intentional blocking assigns in sequential logic for Yosys
BLKLOOPINIT compatibility. UNUSEDPARAM/CASEINCOMPLETE: known benign.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.github/workflows/user_project_ci.yml

@@ -22,6 +22,7 @@ jobs:
           verilator --lint-only -Wall \
             --top-module ldpc_decoder_top \
             -Wno-UNUSEDSIGNAL -Wno-UNDRIVEN -Wno-WIDTHEXPAND -Wno-WIDTHTRUNC \
+            -Wno-UNUSEDPARAM -Wno-CASEINCOMPLETE -Wno-BLKSEQ \
             verilog/rtl/ldpc_decoder_top.sv \
             verilog/rtl/ldpc_decoder_core.sv \
             verilog/rtl/wishbone_interface.sv