Don't test main on semi-binary (#642)

Author: christophfroehlich

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

@@ -39,7 +39,7 @@ jobs:
       fail-fast: false
       matrix:
         ROS_DISTRO: [humble]
-        ROS_REPO: [main, testing]
+        ROS_REPO: [testing]
     with:
       ros_distro: ${{ matrix.ROS_DISTRO }}
       ros_repo: ${{ matrix.ROS_REPO }}

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

@@ -40,7 +40,7 @@ jobs:
       fail-fast: false
       matrix:
         ROS_DISTRO: [iron]
-        ROS_REPO: [main, testing]
+        ROS_REPO: [testing]
     with:
       ros_distro: ${{ matrix.ROS_DISTRO }}
       ros_repo: ${{ matrix.ROS_REPO }}

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

@@ -39,7 +39,7 @@ jobs:
       fail-fast: false
       matrix:
         ROS_DISTRO: [rolling, jazzy]
-        ROS_REPO: [main, testing]
+        ROS_REPO: [testing]
     with:
       ros_distro: ${{ matrix.ROS_DISTRO }}
       ros_repo: ${{ matrix.ROS_REPO }}