Update broken links like graphql or blockchain sites

sdmg15 / Best-websites-a-programmer-should-visit

:link: Some useful websites for programmers.

MIT License

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Open julian-st opened 1 month ago

julian-st commented 1 month ago

[x] My change follows the Contributing Guidelines
[ ] I have added only one new link to the list.
[x] I have checked that the link that I added does NOT exist in the project already.
[x] I have sorted the link alphabetically under the related section.