gh-115119: Update Windows installer to mpdecimal 4.0.0 #111026

Job	Run time
Check for source changes	10s
Check if generated files are up to date	4m 54s
Address sanitizer	10m 14s
Ubuntu SSL tests with OpenSSL (1.1.1w)	1m 57s
Hypothesis tests on Ubuntu	5m 49s
Ubuntu SSL tests with OpenSSL (3.0.13)	2m 13s
CIFuzz	0s
Ubuntu SSL tests with OpenSSL (3.1.5)	2m 5s
Ubuntu SSL tests with OpenSSL (3.2.1)	2m 14s
macOS / build and test (macos-14)	7m 30s
macOS / build and test (macos-13)	8m 33s
macOS (free-threading) / build and test (macos-14)	8m 5s
Thread sanitizer / Thread sanitizer	4m 18s
Thread sanitizer (free-threading) / Thread sanitizer	6m 39s
Ubuntu / build and test	7m 25s
Ubuntu (free-threading) / build and test	10m 55s
WASI / build and test	10m 21s
Windows / build and test (x64)	17m 48s
Windows / build (arm64)	3m 49s
Windows / build and test (x86)	15m 43s
Windows (free-threading) / build and test (x86)	22m 31s
Windows (free-threading) / build and test (x64)	21m 28s
Windows (free-threading) / build (arm64)	3m 49s
Docs / Docs	1m 57s
Docs / Docs (Oldest Sphinx)	1m 56s
Docs / Doctest	14m 34s
All required checks pass	2s
	3h 16m 59s

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