docker: Install cmake which is required by prost

Requirement was added in this PR:
graphprotocol#3531

graph: Allow experimenting with writeonly entites for Uniswap

news: Add section for indexers on 0.26.0

news: Add section for indexers on 0.26.0

Stable release v0.25.2 (control)

news: Release 0.25.2

news: Release 0.25.2

graph, runtime: Update `ethabi` to its latest version