fix: Display mailto links properly in Snaps link warning

[FrederikBolding]

Description

Fixes a formatting issue when displaying mailto links in the SnapLinkWarning. This was broken due to parsing the mailto: link in the same way as HTTPS and assumptions made about the output of that parsing.

Related issues

Fixes: #29977

Manual testing steps

See the attached ticket

Screenshots/Recordings

Before

See the attached ticket

After

[metamaskbot]

Builds ready [d0bfe66]

• builds: chrome, firefox
• builds (flask): chrome, firefox
• builds (MMI): chrome
• builds (test): chrome, firefox
• builds (test-flask): chrome, firefox
• build viz: Build System
• mv3: Bundle Size Stats
• mv2: E2e Actions Stats
• storybook: Storybook
• typescript migration: Dashboard
• all artifacts
• bundle viz:

  • background: 0, 1, 2, 3, 4, 5, 6, 7
  • common: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13
  • ui: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13
  • content-script: 0
  • offscreen: 0

Page Load Metrics (1898 ± 79 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	304	2227	1580	629	302
		domContentLoaded	1619	2147	1853	136	65
		load	1682	2297	1898	165	79
		domInteractive	24	108	49	24	12
		backgroundConnect	9	252	45	54	26
		firstReactRender	16	180	57	38	18
		getState	5	103	24	29	14
		initialActions	0	1	0	0	0
		loadScripts	1128	1655	1365	132	63
		setupStore	8	66	23	22	10
		uiStartup	1896	3087	2226	295	141

Bundle size diffs

• background: 0 Bytes (0.00%)
• ui: 310 Bytes (0.00%)
• common: 0 Bytes (0.00%)