plugin-kubernetes: fix div by zero pod resources

When pods have no resources set, currentToDeclaredResourceToPerc would
throw div by zero, added check

Signed-off-by: Manuel Stein <manuel.stein@nokia-bell-labs.com>

.changeset/wicked-beds-return.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-kubernetes': patch
+---
+
+Fix division by zero in currentToDeclaredResourceToPerc when pod resources weren't set

plugins/kubernetes/src/utils/pod.tsx

@@ -118,6 +118,8 @@ export const currentToDeclaredResourceToPerc = (
   current: number | string,
   resource: number | string,
 ): string => {
+  if(Number(resource) == 0) return `0%`;
+
   if (typeof current === 'number' && typeof resource === 'number') {
     return `${Math.round((current / resource) * 100)}%`;
   }