ci: ignore translation cache changes in test workflow

.github/workflows/test.yml

@@ -11,6 +11,7 @@ on:
     paths-ignore:
       - 'manual/**'
       - '!manual/References.md'
+      - '.translation-cache/**'
       - 'cmake/GetGALERA.cmake'
       - 'galera_packaging/**'
   pull_request:
@@ -18,6 +19,7 @@ on:
     paths-ignore:
       - 'manual/**'
       - '!manual/References.md'
+      - '.translation-cache/**'
       - 'cmake/GetGALERA.cmake'
       - 'galera_packaging/**'
     types: [opened, synchronize, reopened, labeled, unlabeled]