Switch to latest upcoming image

GHA image ubuntu-latest will switch from 22.04 to 24.04 in August.
Switching to use the upcoming latest version

.github/workflows/pr.yml

@@ -7,7 +7,7 @@ on:
 jobs:
   ansible-lint:
     name: Ansible-lint Check
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -147,7 +147,7 @@ jobs:
 
   check-all-dependencies-are-merged:
     name: "Check all dependencies are merged"
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
 
       - name: Check all dependent Pull Requests are merged
@@ -158,7 +158,7 @@ jobs:
 
   check-docs:
     name: Check version, documentation and README
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
       - name: Checkout
         uses: actions/checkout@v4