typo fix

Author: Pan-chao

README-ci-failures.md

@@ -19,7 +19,7 @@ for the changes before attempting to deploy the fixed script.
 ## Integration test failures
 
 If your CI error is related to a timeout logged by one of the integration test
-runnners, this is a known issue and re-running the test in the Buildkite 
+runners, this is a known issue and re-running the test in the Buildkite 
 interface will usually succeed.
 
 If an issue arises, please post an update in both `development` on the Mina
@@ -32,7 +32,7 @@ The CI runs its jobs in multiple Docker images. The images that it is using are
 specified in `buildkite/src/Constants/COntainerImages.dhall`: the CI uses all
 Debian images prefixed by `minaToolchainBuster`.
 
-Theses images are generated by the CI itself, in particular based on the content of the
+These images are generated by the CI itself, in particular based on the content of the
 `dockerfiles` directory and the `opam.export` file (which describes versions of
 OCaml packages). If you PR modifies how the images are generated (for example by
 changing a package version in `opam.export`), then the CI will not automatically