Bump snap to 948961, bump libp2p for ip6 bogons fix

[Vagabond]

No description provided.

[abhay]

Height 948961
Hash <<19,50,5,163,142,196,109,103,169,240,60,199,176,169,186,104,164,133,24,6,
       243,111,228,119,250,190,59,71,42,81,85,135>> (<<"133205a38ec46d67a9f03cc7b0a9ba68a4851806f36fe477fabe3b472a515587">>)
Have true

$ curl --head https://snapshots.helium.wtf/mainnet/snap-948961
HTTP/2 200 
content-length: 131334975
date: Mon, 02 Aug 2021 16:42:45 GMT
last-modified: Mon, 02 Aug 2021 13:16:12 GMT
etag: "134d308fef23a6ffe578b1a7a5b84339"
x-amz-version-id: null
accept-ranges: bytes
server: AmazonS3
x-cache: Hit from cloudfront
via: 1.1 28b8fcaccf73021230d8e4a6c3d9e81e.cloudfront.net (CloudFront)
x-amz-cf-pop: YTO50-C1
x-amz-cf-id: 6luFHwtv-szaMeU3Ehd3OsaiSwdaRvMZhO