build(deps): bump github.com/vmware/govmomi from 0.23.0 to 0.26.1

Bumps [github.com/vmware/govmomi](https://github.com/vmware/govmomi) from 0.23.0 to 0.26.1.
- [Release notes](https://github.com/vmware/govmomi/releases)
- [Changelog](https://github.com/vmware/govmomi/blob/master/CHANGELOG.md)
- [Commits](https://github.com/vmware/govmomi/compare/v0.23.0...v0.26.1)

---
updated-dependencies:
- dependency-name: github.com/vmware/govmomi
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/github.com/vmware/govmomi/vapi/rest/resource.go

@@ -48,11 +48,12 @@ func (r *Resource) WithAction(action string) *Resource {
 	return r.WithParam("~action", action)
 }
 
-// WithParam sets adds a parameter to the URL.RawQuery
+// WithParam adds one parameter on the URL.RawQuery
 func (r *Resource) WithParam(name string, value string) *Resource {
-	r.u.RawQuery = url.Values{
-		name: []string{value},
-	}.Encode()
+	// ParseQuery handles empty case, and we control access to query string so shouldn't encounter an error case
+	params, _ := url.ParseQuery(r.u.RawQuery)
+	params[name] = []string{value}
+	r.u.RawQuery = params.Encode()
 	return r
 }