Use nushell's fork for winget-pkgs publishing (#15808)

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# Description
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Try to use nushell's fork for winget-pkgs publishing

.github/workflows/winget-submission.yml

@@ -26,4 +26,4 @@ jobs:
           version: ${{ inputs.tag_name || github.event.release.tag_name }}
           release-tag: ${{ inputs.tag_name || github.event.release.tag_name }}
           token: ${{ secrets.NUSHELL_PAT }}
-          fork-user: fdncred
+          fork-user: nushell