Exclude vim25/json from GH CodeStyle workflow

This patch excludes the vendored vim25/json package from the
GitHub action that checks code style for Go sources.

.github/workflows/govmomi-go-lint.yaml

@@ -99,7 +99,7 @@ jobs:
           boilerplate-check check \
             --boilerplate ./hack/boilerplate/boilerplate.${{ matrix.extension }}.txt \
             --file-extension ${{ matrix.extension }} \
-            --exclude "(vendor|third_party|dist)/" |
+            --exclude "((vim25/json)|vendor|third_party|dist)/" |
           reviewdog -efm="%A%f:%l: %m" \
                 -efm="%C%.%#" \
                 -name="${{ matrix.language }} headers" \

.golangci.yml

@@ -14,5 +14,6 @@ linters-settings:
 run:
   timeout: 6m
   skip-dirs:
+  - vim25/json
   - vim25/xml
   - cns/types