Fix TIP-20 spec links in explorer

[decofe]

Summary

• Update TIP-20 Spec links in the explorer contract and token banners to the current docs URL without the stale anchor.

Validation

• pnpm --filter explorer check:types
• pnpm --filter explorer check:biome

Prompted by: @joshitzko

[github-actions]

Bundle Size Report

Metric	Size	Δ Change
Total	5.5 MB	+1.3 MB (+29.8%)
Gzip	1.6 MB	+408.4 KB (+32.7%)
Brotli	1.4 MB	+353.9 KB (+32.6%)

Chunk changes (>1KB)

Chunk	Change
assets/chains.js (removed)	-360.7 KB
assets/tempo-queries.js (removed)	-302.4 KB
assets/export-rate-limit.js (removed)	-177.3 KB
assets/decodeAbiParameters.js (removed)	-71.7 KB
assets/queryOptions.js (removed)	-58.2 KB
assets/schemas.js (removed)	-45.9 KB
assets/AbiItem.js (removed)	-27.1 KB
assets/Bytes.js	-9.6 KB
assets/fee-amm-pool-rows.js (removed)	-6.6 KB
assets/validators.js (removed)	-5.1 KB
assets/wagmi.config.js	-4.0 KB
assets/token.js	-3.9 KB
assets/tokens.js	-2.7 KB
assets/readContracts.js (removed)	-2.7 KB
assets/Value.js (removed)	-1.0 KB
assets/formatting.js	+1.1 KB
assets/chevron-down.js (new)	+1.6 KB
assets/.js	+1.6 KB
assets/known-event-totals.js (new)	+2.1 KB
assets/Amount.js	+2.5 KB
...and 21 more

Compared against main branch (baseline from 4/27/2026, 4:02:54 PM)

[github-actions]

Cloudflare Deployments

App	Environment	Status	Preview
explorer	devnet	[OK] Deployed	View Preview
explorer	mainnet	[OK] Deployed	View Preview
explorer	nextfork	[OK] Deployed	View Preview
explorer	testnet	[OK] Deployed	View Preview
fee-payer	devnet	[>>] Skipped	No changes
fee-payer	moderato	[>>] Skipped	No changes
fee-payer	privy	[>>] Skipped	No changes
og	-	[>>] Skipped	No changes
reth-snapshots-viewer	-	[>>] Skipped	No changes
tempo-snapshots-viewer	-	[>>] Skipped	No changes
tokenlist	-	[>>] Skipped	No changes