(PUP-11946) Bump Github Actions to v4

Author: cthorn42

.github/workflows/checks.yaml

@@ -23,7 +23,7 @@ jobs:
     runs-on: ${{ matrix.cfg.os }}
     steps:
       - name: Checkout current PR
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
 

.github/workflows/mend.yaml

@@ -11,7 +11,7 @@ jobs:
     name: Mend Monitor
     steps:
       - name: Checkout current PR
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Setup Ruby
         uses: ruby/setup-ruby@v1
         with:

.github/workflows/rspec_tests.yaml

@@ -29,7 +29,7 @@ jobs:
     runs-on: ${{ matrix.cfg.os }}
     steps:
       - name: Checkout current PR
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install ruby version ${{ matrix.cfg.ruby }}
         uses: ruby/setup-ruby@v1