Reorder "Test Go" workflow's paths filter to match template

No functional change, and neither is necessarily superior, but this is how it is in the "template", and so it must be
here as well.

Author: per1234

.github/workflows/test-go-task.yml

@@ -15,17 +15,17 @@ on:
       - "**/go.mod"
       - "**/go.sum"
       - "Taskfile.ya?ml"
-      - "**/testdata/**"
       - "**.go"
+      - "**/testdata/**"
   pull_request:
     paths:
       - ".github/workflows/test-go-task.ya?ml"
       - "codecov.ya?ml"
       - "**/go.mod"
       - "**/go.sum"
       - "Taskfile.ya?ml"
-      - "**/testdata/**"
       - "**.go"
+      - "**/testdata/**"
   workflow_dispatch:
   repository_dispatch: