Mention the correct ticker in account summary

[csillag]

On Testnet, say:

To send, receive, stake and swap TEST tokens, open your wallet!

[github-actions]

MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ EDITORCONFIG	editorconfig-checker	2		0	0.02s
✅ GIT	git_diff	yes		no	0.01s
✅ JSON	eslint-plugin-jsonc	1	0	0	1.19s
✅ JSON	jsonlint	1		0	0.32s
✅ JSON	prettier	1	0	0	0.71s
✅ JSON	v8r	1		0	1.2s
✅ TSX	eslint	1	0	0	5.98s

See errors details in artifact MegaLinter reports on CI Job page
Set VALIDATE_ALL_CODEBASE: true in mega-linter.yml to validate all sources, not only the diff