Codegen: Update import paths from old package name to new

[msutkowski]

Just fixes the import paths as mentioned in #1775

[codesandbox-ci]

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Sandbox	Source
Vanilla	Configuration
Vanilla Typescript	Configuration
rsk-github-issues-example	Configuration
@examples-query-react/basic	Configuration
reduxjs/redux-toolkit	Configuration
@examples-action-listener/counter	Configuration

[github-actions]

size-limit report 📦

Path	Size
1. entry point: @reduxjs/toolkit (cjs.production.min.js)	12.93 KB (0%)
1. entry point: @reduxjs/toolkit (esm.js)	10.79 KB (0%)
1. entry point: @reduxjs/toolkit/query (cjs.production.min.js)	22.59 KB (0%)
1. entry point: @reduxjs/toolkit/query (esm.js)	18.94 KB (0%)
1. entry point: @reduxjs/toolkit/query/react (cjs.production.min.js)	24.83 KB (0%)
1. entry point: @reduxjs/toolkit/query/react (esm.js)	21.63 KB (0%)
2. entry point: @reduxjs/toolkit (without dependencies) (cjs.production.min.js)	5.71 KB (0%)
2. entry point: @reduxjs/toolkit (without dependencies) (esm.js)	5.67 KB (0%)
2. entry point: @reduxjs/toolkit/query (without dependencies) (cjs.production.min.js)	10.05 KB (0%)
2. entry point: @reduxjs/toolkit/query (without dependencies) (esm.js)	10.47 KB (0%)
2. entry point: @reduxjs/toolkit/query/react (without dependencies) (cjs.production.min.js)	2.8 KB (0%)
2. entry point: @reduxjs/toolkit/query/react (without dependencies) (esm.js)	3.21 KB (0%)
3. createSlice (esm.js)	5.03 KB (0%)
3. createEntityAdapter (esm.js)	6.28 KB (0%)
3. configureStore (esm.js)	5.65 KB (0%)
3. createApi (esm.js)	17.18 KB (0%)
3. createApi (react) (esm.js)	19.89 KB (0%)
3. fetchBaseQuery (esm.js)	11.61 KB (0%)
3. setupListeners (esm.js)	10.42 KB (0%)
3. ApiProvider (esm.js)	18.52 KB (0%)