docs(typescript): align `AppThunk` extra arg type with `createAsyncThunk.withTypes` #1544

Job	Run time
Check for changes	5s
Lint, Test, Build & Pack on Node ${{ matrix.node }}	0s
Test against dist	0s
Check package config with are-the-types-wrong	0s
Test Types with TypeScript ${{ matrix.ts }}	0s
Test Published Artifact ${{ matrix.example }}	0s
	5s

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