fix github actions config

.github/workflows/cross_platform_tests.yml

@@ -1,4 +1,4 @@
-name: run_all_tests
+name: cross_platform_tests
 on: [push]
 jobs:
   install-iverilog-source:

.github/workflows/functional_simulation.yml

@@ -3,8 +3,8 @@ on: [push]
 jobs:
   uart:
     runs-on: ubuntu-latest
-    uses: actions/checkout@v3
     steps:
+      - uses: actions/checkout@v3
       - run: sudo apt install iverilog
       - run: iverilog -g2012 -o sim.out test/uart_tb.sv src/uart_tx.sv src/uart_rx.sv
       - run: vvp sim.out