Pin ubuntu version to 22.04 for all github workflows

ubuntu-latest might introduce some build issues when a new version
is provided as latests. This gives us more control over the upgrade.

Signed-off-by: Bernd Hufmann <bernd.hufmann@ericsson.com>

.github/workflows/ci-cd.yml

@@ -17,7 +17,7 @@ jobs:
 
     strategy:
       matrix:
-        os: [ubuntu-latest]
+        os: [ubuntu-22.04]
         node-version: [18]
 
     steps:

.github/workflows/docker-example.yml

@@ -15,7 +15,7 @@ jobs:
 
     strategy:
       matrix:
-        os: [ubuntu-latest]
+        os: [ubuntu-22.04]
         node-version: [18]
 
     steps:

.github/workflows/license-check-workflow.yml

@@ -19,7 +19,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest]
+        os: [ubuntu-22.04]
         node: [18]
         java: [11]
 

.github/workflows/release.yml

@@ -17,7 +17,7 @@ jobs:
   gh-release:
     name: GitHub release
     if: github.repository == 'eclipse-cdt-cloud/theia-trace-extension'
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     steps:
       - uses: actions/checkout@v3