Update gpu.yml

Author: khosravipasha

.github/workflows/gpu.yml

@@ -16,7 +16,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: julia-actions/setup-julia@latest
         with:
-          version: 1.5
+          version: 1.7
 
       # Runs a single command using the runners shell
       - name: Unit Tests
@@ -26,4 +26,4 @@ jobs:
           
       - name: Codecov Upload
         run: |
-          julia -e 'using Pkg; Pkg.add("Coverage"); using Coverage; Codecov.submit(process_folder());'
+          julia -e 'using Pkg; Pkg.add("Coverage"); using Coverage; Codecov.submit(process_folder());'