docs: Pull Shark badge tweak

[nosense00]

Minor change for OSS badge.

[github-actions]

size-limit report 📦

Path	Size	Loading time (3g)	Running time (snapdragon)	Total time
import * from 'viem' (esm)	70.82 KB (0%)	1.5 s (0%)	2.1 s (+1.46% 🔺)	3.5 s
const viem = require('viem') (cjs)	87.88 KB (0%)	1.8 s (0%)	1.4 s (-55.29% 🔽)	3.1 s
import { createClient, http } from 'viem'	4.57 KB (0%)	92 ms (0%)	124 ms (-48.09% 🔽)	215 ms
import * from 'viem/account-abstraction'	53.08 KB (0%)	1.1 s (0%)	1.1 s (-41.74% 🔽)	2.2 s
import * from 'viem/accounts'	82.62 KB (0%)	1.7 s (0%)	773 ms (-10.93% 🔽)	2.5 s
import { privateKeyToAccount } from 'viem/accounts'	21.05 KB (0%)	421 ms (0%)	311 ms (-44.49% 🔽)	732 ms
import { mnemonicToAccount } from 'viem/accounts'	27.33 KB (0%)	547 ms (0%)	504 ms (-15.88% 🔽)	1.1 s
import * from 'viem/actions'	55.6 KB (0%)	1.2 s (0%)	1.5 s (+59.9% 🔺)	2.6 s
import { getBlockNumber } from 'viem/actions'	318 B (0%)	10 ms (0%)	10 ms (-89.54% 🔽)	20 ms
import * from 'viem/chains'	47.62 KB (0%)	953 ms (0%)	782 ms (-12.67% 🔽)	1.8 s
import { mainnet } from 'viem/chains'	325 B (0%)	10 ms (0%)	30 ms (-48.56% 🔽)	40 ms
import * from 'viem/chains/utils'	1.08 KB (0%)	22 ms (0%)	36 ms (+497.76% 🔺)	58 ms
import * from 'viem/ens'	47.82 KB (0%)	957 ms (0%)	721 ms (+32.62% 🔺)	1.7 s
import { getEnsAvatar } from 'viem/ens'	24.05 KB (0%)	482 ms (0%)	703 ms (-0.39% 🔽)	1.2 s
import * from 'viem/siwe'	33.13 KB (0%)	663 ms (0%)	742 ms (+47.08% 🔺)	1.5 s
import { verifySiweMessage } from 'viem/siwe'	32.02 KB (0%)	641 ms (0%)	595 ms (+10.07% 🔺)	1.3 s