devops: add repositories for gcc 15

Signed-off-by: Aaron Teo <[email protected]>

Author: taronaeo

.github/workflows/build.yml

@@ -213,7 +213,12 @@ jobs:
         id: install_gcc
         run: |
           sudo apt-get update
-          sudo apt-get install -y --no-install-recommends gcc-15 g++-15
+          sudo apt-get install -y --no-install-recommends \
+            software-properties-common
+          sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
+          sudo apt-get update
+          sudo apt-get install -y --no-install-recommends \
+            gcc-15 g++-15
           sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-15 15
           sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-15 15