fix(dashboard): align regex with existing pattern in toolkit

Use [^\]]+ (same as existing code in utils.ts) instead of [^[\]]+ for
consistency.

Assisted-By: Claude AI
Signed-off-by: Kirill Ilin <stitch14@yandex.ru>

packages/system/dashboard/images/openapi-ui/openapi-k8s-toolkit/patches/flatmap-unresolved-placeholder.diff

@@ -7,7 +7,7 @@ diff --git a/src/components/molecules/EnrichedTable/organisms/EnrichedTableProvi
              }
 -            const jpQueryResult = jp.query(el, `$${resolvedJsonPath}`)
 -            fieldValue = Array.isArray(jpQueryResult) && jpQueryResult.length === 1 ? jpQueryResult[0] : jpQueryResult
-+            if (/_flatMap[^[\]]+_Key/.test(resolvedJsonPath)) {
++            if (/_flatMap[^\]]+_Key/.test(resolvedJsonPath)) {
 +              // Placeholder was not resolved (row not yet expanded or key missing) — skip query
 +              fieldValue = null
 +            } else {