Fix Skylark documentation links
Fix Skylark documentation links

I thought Jekyll would translate these, but apparently not?

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MOS_MIGRATED_REVID=112977415

davidzchen/bazel-website,bazelbuild/bazel-website,davidzchen/bazel-website,davidzchen/bazel-website,bazelbuild/bazel-website,bazelbuild/bazel-website,davidzchen/bazel-website