Updated workflows to use Ubuntu 22.04, as 20.04 is not supported anymore

Author: ChristianH99

.github/workflows/build_award_guidelines.yml

@@ -10,7 +10,7 @@ on:
 jobs:
   build:
     name: build award guidelines
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     steps:
       - name: Checkout repository with submodules

.github/workflows/build_entry_rules.yml

@@ -10,7 +10,7 @@ on:
 jobs:
   build:
     name: build entry rules
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     steps:
       - name: Checkout repository with submodules

.github/workflows/build_main_rules.yml

@@ -10,7 +10,7 @@ on:
 jobs:
   build:
     name: build main rules
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     steps:
       - name: Checkout repository with submodules