fix: Remove non-existent CHANGELOG.md references from UV and Poetry templates #3103

Job	Run time
Integration Tests (pdm.minimal.lock)	29s
Integration Tests (pdm.lock)	32s
test_min_deps (macos-latest)	1m 12s
test_min_deps (ubuntu-latest)	46s
test (3.10, macos-latest)	1m 26s
test (3.10, ubuntu-latest)	59s
test_min_deps (windows-latest)	1m 14s
test (3.10, windows-latest)	2m 6s
test (3.11, macos-latest)	1m 8s
test (3.11, ubuntu-latest)	1m 7s
test (3.11, windows-latest)	1m 33s
test (3.13, ubuntu-latest)	1m 11s
test (3.14, windows-latest)	1m 31s
test (3.12, macos-latest)	45s
test (3.13, macos-latest)	1m 6s
test (3.14, macos-latest)	1m 6s
test (3.13, windows-latest)	1m 51s
test (3.14, ubuntu-latest)	1m 16s
test (3.12, windows-latest)	1m 52s
test (3.12, ubuntu-latest)	1m 12s
Combine & check coverage	15s
	24m 37s

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