Configure GitHub Actions workflow to use Clang compiler

Update build workflow to use Clang as the default compiler for building the project

.github/workflows/build.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Install Dependencies
         run: |
           sudo apt-get update
-          sudo apt-get install -y build-essential cmake libabsl-dev
+          sudo apt-get install -y build-essential cmake libabsl-dev clang
 
       - name: Create build directory
         run: mkdir build
@@ -27,7 +27,7 @@ jobs:
       - name: Configure the project
         run: |
           cd build
-          cmake ..
+          CC=clang CXX=clang++ cmake ..
 
       - name: Build the project
         run: |