docs: Remove `rspack.core` version constraint #168

Job	Run time
PR title check	4s
Code checks / Spell check	6s
Code checks / Actions lint check	31s
Doc checks / Doc checks / Docs check	2m 3s
Code checks / Type check / Type check (3.10)	31s
Code checks / Type check / Type check (3.14)	28s
Code checks / Type check / Type check (3.11)	27s
Code checks / Type check / Type check (3.13)	29s
Code checks / Lint check / Lint check (3.10)	23s
Code checks / Lint check / Lint check (3.12)	23s
Code checks / Type check / Type check (3.12)	28s
Code checks / Lint check / Lint check (3.14)	25s
Code checks / Lint check / Lint check (3.11)	25s
Tests / Unit tests / Unit tests (macos-latest, 3.10)	9m 23s
Tests / Unit tests / Unit tests (windows-latest, 3.13)	6m 27s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.11)	4m 35s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.10)	4m 59s
Tests / Unit tests / Unit tests (windows-latest, 3.12)	6m 44s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.12)	5m 11s
Tests / Unit tests / Unit tests (windows-latest, 3.11)	7m 9s
Code checks / Lint check / Lint check (3.13)	28s
Tests / Unit tests / Unit tests (windows-latest, 3.10)	6m 30s
Tests / Unit tests / Unit tests (macos-latest, 3.12)	7m 26s
Tests / Unit tests / Unit tests (macos-latest, 3.11)	7m 49s
Tests / Unit tests / Unit tests (windows-latest, 3.14)	6m 12s
Tests / Unit tests / Unit tests (macos-latest, 3.13)	6m 41s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.13)	4m 51s
Tests / Unit tests / Unit tests (macos-latest, 3.14)	6m 21s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.14)	3m 38s
	1h 41m 7s

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