Add info about uninstalling SFDX that has been installed using Windows Installer

[nvuillam]

Fixes #417

[github-actions]

🦙 MegaLinter status: ⚠️ WARNING

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ ACTION	actionlint	7		0	0.1s
✅ COPYPASTE	jscpd	yes		no	12.11s
✅ DOCKERFILE	hadolint	1		0	0.1s
✅ JSON	eslint-plugin-jsonc	11	0	0	1.38s
✅ JSON	npm-package-json-lint	yes		no	0.54s
✅ JSON	prettier	11	0	0	1.18s
✅ JSON	v8r	11		0	10.21s
⚠️ MARKDOWN	markdownlint	121	2	199	12.5s
✅ MARKDOWN	markdown-table-formatter	121	2	0	1.07s
✅ REPOSITORY	checkov	yes		no	24.08s
⚠️ REPOSITORY	gitleaks	yes		2	8.65s
⚠️ REPOSITORY	grype	yes		1	14.9s
✅ REPOSITORY	secretlint	yes		no	2.77s
✅ REPOSITORY	trivy	yes		no	5.87s
✅ REPOSITORY	trivy-sbom	yes		no	3.53s
✅ REPOSITORY	trufflehog	yes		no	7.04s
✅ SPELL	cspell	287		0	16.05s
✅ SPELL	lychee	146		0	6.0s
✅ TYPESCRIPT	eslint	127	0	0	7.83s
✅ TYPESCRIPT	prettier	127	0	0	8.38s
✅ XML	xmllint	2	0	0	0.1s
✅ YAML	prettier	12	0	0	1.11s
✅ YAML	v8r	12		0	22.41s
✅ YAML	yamllint	12		0	0.76s

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