Retry the build three times

Author: jneira

.github/workflows/test.yml

@@ -55,7 +55,7 @@ jobs:
                    src/**/*.hs exe/*.hs
 
     - name: Build
-      run: cabal build
+      run: cabal build || cabal build || cabal build
     - name: Test
       env:
         HLS_TEST_EXE: hls