pnpm-workspace.yaml: name native-fungible as workspace member (#4525)

## Motivation

`fungible` was incorrectly named as the workspace member, instead of
`native-fungible`, which could lead to some confusing issues when
building the `native-fungible` frontend (e.g. `vite` would not be found
during a Vite build step).

## Proposal

Fix it.

## Test Plan

`pnpm install` in the `native-fungible` directory.

## Release Plan

- Nothing to do / These changes follow the usual release cycle.

## Links

- [reviewer
checklist](https://github.com/linera-io/linera-protocol/blob/main/CONTRIBUTING.md#reviewer-checklist)

Signed-off-by: James Kay <[email protected]>

Author: Twey

examples/pnpm-workspace.yaml

@@ -3,4 +3,4 @@ packages:
 - ../linera-web/signer
 - counter
 - counter/metamask
-- fungible
+- native-fungible