Updated testing action

Author: CalebDepatie

.github/workflows/testing.yml

@@ -4,14 +4,14 @@
 
 name: Testing Suite
 
-on: [ push, pull_request ]
+on: [ push ]
 
 jobs:
   unit_test:
     runs-on: ubuntu-22.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - uses: cachix/install-nix-action@v18
         with:
           nix_path: nixpkgs=channel:nixos-unstable