Upgrade checkout action to latest

* And remove tokens since the repo is now public

Signed-off-by: Ryan Friedman <[email protected]>

Author: Ryanf55

.github/workflows/build_test.yml

@@ -17,10 +17,7 @@ jobs:
           - {rosdistro: 'humble', container: 'osrf/ros:humble-desktop'}
     container: ${{ matrix.config.container }}
     steps:
-    - uses: actions/checkout@v1
-      with:
-        token: ${{ secrets.ACCESS_TOKEN }}
-        github-token: ${{ secrets.GITHUB_TOKEN }}
+    - uses: actions/checkout@v4
     - name: Install Dependencies
       working-directory: 
       run: |

.github/workflows/check_style.yml

@@ -18,7 +18,7 @@ jobs:
         - 'px4io/px4-dev-simulation-focal:2020-09-14'
     container: ${{ matrix.container }}
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v4
     - name: submodule update
       run: git submodule update --init --recursive
     - name: Install clang-format