ci: github: fix ubuntu version to 22.04

.github/workflows/jwt-cpp.yml

@@ -17,7 +17,7 @@ jobs:
     name: Build wolfSSL
     # Just to keep it the same as the testing target
     if: github.repository_owner == 'wolfssl'
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     # This should be a safe limit for the tests to run.
     timeout-minutes: 4
     steps:
@@ -47,7 +47,7 @@ jobs:
         ref: [ 0.6.0 ]
     name: ${{ matrix.ref }}
     if: github.repository_owner == 'wolfssl'
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     needs: build_wolfssl
     steps:
       - name: Install dependencies