update ci image version (#360)

Signed-off-by: Fabrice Meyer <meyer.fabrice@gmx.fr>

Author: chadek

.github/workflows/prerelease.yml

@@ -9,7 +9,7 @@ env:
 
 jobs:
   build_and_publish:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     environment: release
     steps:
       - name: Checkout

.github/workflows/release.yml

@@ -9,7 +9,7 @@ env:
 
 jobs:
   build_and_publish:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     environment: release
     steps:
       - name: Checkout