Fix comment for `SetBitAt`

Failed in 23s
:bazel: Build & Test Everything bazel version && bazel build //... && bazel test //... && bazel coverage //... && bash <(curl -s https://codecov.io/bash) -s $(bazel info bazel-testlogs) -f '**/coverage.dat'
Waited 1s
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Ran in 9s
:bazel: Build & Test Everything bazel version && bazel build //... && bazel test //... && bazel coverage //... && bash <(curl -s https://codecov.io/bash) -s $(bazel info bazel-testlogs) -f '**/coverage.dat'
Waited 5s
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Ran in 1s
:bazel: Build & Test Everything bazel version && bazel build //... && bazel test //... && bazel coverage //... && bash <(curl -s https://codecov.io/bash) -s $(bazel info bazel-testlogs) -f '**/coverage.dat'
Waited 5s
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Ran in 2s
Total Job Run Time: 11s