Replaced os.path.join with urllib.parse.urljoin

[GrandMoff100]

Closes #96

[GrandMoff100]

MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ ACTION	actionlint	4		0	0.05s
✅ CREDENTIALS	secretlint	yes		no	0.65s
✅ GIT	git_diff	yes		no	0.01s
✅ JSON	eslint-plugin-jsonc	2	0	0	0.78s
✅ JSON	jsonlint	2		0	0.47s
✅ JSON	prettier	2	0	0	0.43s
✅ JSON	v8r	2		0	1.79s
✅ MARKDOWN	markdownlint	6	0	0	0.3s
✅ MARKDOWN	markdown-link-check	6		0	1.91s
✅ MARKDOWN	markdown-table-formatter	6	0	0	0.21s
✅ SPELL	misspell	26	0	0	0.06s
✅ YAML	prettier	7	0	0	0.62s
✅ YAML	v8r	7		0	5.05s
✅ YAML	yamllint	7		0	0.14s

See errors details in artifact MegaLinter reports on CI Job page