Use correct ref for scheduled workflows

.github/workflows/humble-debian-build.yml

@@ -20,6 +20,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           path: src/ros2_controllers
+          ref: ${{ github.event_name == 'schedule' && 'humble' || '' }}
       - name: Build and test
         shell: bash
         run: |

.github/workflows/humble-rhel-binary-build.yml

@@ -19,6 +19,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           path: src/ros2_controllers
+          ref: ${{ github.event_name == 'schedule' && 'humble' || '' }}
       - name: Install dependencies
         run: |
           rosdep update

.github/workflows/iron-debian-build.yml

@@ -20,6 +20,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           path: src/ros2_controllers
+          ref: ${{ github.event_name == 'schedule' && 'iron' || '' }}
       - name: Build and test
         shell: bash
         run: |

.github/workflows/iron-rhel-binary-build.yml

@@ -20,6 +20,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           path: src/ros2_controllers
+          ref: ${{ github.event_name == 'schedule' && 'iron' || '' }}
       - name: Install dependencies
         run: |
           rosdep update

.github/workflows/rolling-debian-build.yml

@@ -20,6 +20,8 @@ jobs:
       - uses: actions/checkout@v4
         with:
           path: src/ros2_controllers
+          # default behavior is correct on master branch
+          # ref: ${{ github.event_name == 'schedule' && 'master' || '' }}
       - name: Build and test
         shell: bash
         run: |

.github/workflows/rolling-rhel-binary-build.yml

@@ -20,6 +20,8 @@ jobs:
       - uses: actions/checkout@v4
         with:
           path: src/ros2_controllers
+          # default behavior is correct on master branch
+          # ref: ${{ github.event_name == 'schedule' && 'master' || '' }}
       - name: Install dependencies
         run: |
           rosdep update