Verify the integrity of Nimbus

We've recently added checksums to the end of our release notes (a practice we will be continuing from now on). Please make sure you get into the habit of verifying these 🙏

For those of you who are unfamiliar, a checksum is a special type of hash used to verify the integrity of a file. Verifying a checksum ensures there was no corruption or manipulation during the download and that the file was downloaded completely and correctly. For a short and simple guide on how to do so, see here.

In the case of the v1.1.0 release for example, the SHA512 checksums are:

# Linux AMD64
8d553ea5422645b5f06001e7f47051706ae5cffd8d88c45e4669939f3abb6caf41a2477431fce3e647265cdb4f8671fa360d392f423ac68ffb9459607eaab462  nimbus_beacon_node
# Linux ARM64
93ffd03a0ce67f7d035e3dc45e97de3c2c9a05a8dd0c6d5f45402ddb04404dc3cf15b80fee972f34152ef171ce97c40f794448bc779ca056081c945f71f19788  nimbus_beacon_node
# Linux ARM
f2e75f3fae2aea0a9f8d45861d52b0e2546c3990f453b509fab538692d18c64e65f58441c5492064fc371e0bc77de6bab970e05394cfd124417601b55cb4a825  nimbus_beacon_node
# Windows AMD64
fd68c8792ea60c2c72e9c2201745f9698bfd1dae4af4fa9e1683f082109045efebd1d80267f13cafeb1cd7414dc0f589a8a73f12161ac2758779369289d5a832  nimbus_beacon_node