GHA Docker: set cpp-examples-collection to latest commit

Author: stephen-derosa

.github/workflows/builds.yml

@@ -266,6 +266,17 @@ jobs:
           submodules: recursive
           fetch-depth: 0
 
+      - name: Free disk space (GitHub-hosted runner)
+        uses: jlumbroso/free-disk-space@v1.3.1
+        with:
+          tool-cache: false
+          android: true
+          dotnet: true
+          haskell: true
+          large-packages: true
+          docker-images: true
+          swap-storage: true
+
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
@@ -305,6 +316,17 @@ jobs:
           submodules: recursive
           fetch-depth: 0
 
+      - name: Free disk space (GitHub-hosted runner)
+        uses: jlumbroso/free-disk-space@v1.3.1
+        with:
+          tool-cache: false
+          android: true
+          dotnet: true
+          haskell: true
+          large-packages: true
+          docker-images: true
+          swap-storage: true
+
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
@@ -353,7 +375,7 @@ jobs:
             set -euxo pipefail
             git clone https://github.com/livekit-examples/cpp-example-collection.git /tmp/cpp-example-collection
             cd /tmp/cpp-example-collection
-            git checkout sderosa/examples-migration
+            git checkout f231c0c75028d1dcf13edcecd369d030d2c7c8d4
             cmake -S . -B build -DLIVEKIT_LOCAL_SDK_DIR=/opt/livekit-sdk
             cmake --build build --parallel
           '
@@ -378,7 +400,7 @@ jobs:
             set -euxo pipefail
             git clone https://github.com/livekit-examples/cpp-example-collection.git /tmp/cpp-example-collection
             cd /tmp/cpp-example-collection
-            git checkout sderosa/examples-migration
+            git checkout f231c0c75028d1dcf13edcecd369d030d2c7c8d4
             cmake -S . -B build -DLIVEKIT_LOCAL_SDK_DIR=/opt/livekit-sdk
             cmake --build build --parallel
           '