Update GitHub action versions

Bump to v6 of checkout and login-action to v3, and the latest base image - ubuntu-24.04

Author: razo7

.github/workflows/post-submit.yaml

@@ -9,15 +9,15 @@ on:
 jobs:
   push_to_registry:
     name: Build and push images to quay.io/medik8s
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
       - name: Log in to Quay.io
-        uses: docker/login-action@v2
+        uses: docker/login-action@v3
         with:
           username: ${{ secrets.QUAY_USERNAME }}
           password: ${{ secrets.QUAY_PASSWORD }}

.github/workflows/pre-submit.yaml

@@ -10,10 +10,10 @@ on:
       - release-*
 jobs:
   build:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     steps:
     - name: Checkout code
-      uses: actions/checkout@v3
+      uses: actions/checkout@v6
       with:
         fetch-depth: 0