Remove alpha version notes in migration posts (#10766) #315

Job	Run time
🧹 Prettier Check	2m 33s
Linting Check / eslint	2m 35s
Testing exports integrity	2m 37s
Examples - Normal	6m 25s
Validating dev-tests (esm)	2m 32s
Validating dev-tests (cjs)	2m 30s
Watcher Unit Test on Node 20 (ubuntu-latest) and GraphQL v16	1m 48s
Unit Test on Node 22 (ubuntu-latest) and GraphQL v15	2m 44s
Unit Test on Node 24 (ubuntu-latest) and GraphQL v15	2m 18s
Unit Test on Node (windows-latest) and GraphQL v16	2m 41s
Watcher Unit Test on Node 20 (ubuntu-latest) and GraphQL v15	2m 6s
Unit Test on Node 22 (ubuntu-latest) and GraphQL v16	2m 30s
Unit Test on Node 24 (ubuntu-latest) and GraphQL v16	2m 35s
Watcher Unit Test on Node (windows-latest) and GraphQL v16	2m 9s
	38m 3s

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