Fix Dockerfile.

Author: hoolioh

tools/docker/Dockerfile.build

@@ -78,8 +78,8 @@ COPY "ddtelemetry/Cargo.toml" "ddtelemetry/"
 COPY "ddtelemetry-ffi/Cargo.toml" "ddtelemetry-ffi/"
 COPY "datadog-log/Cargo.toml" "datadog-log/"
 COPY "datadog-log-ffi/Cargo.toml" "datadog-log-ffi/"
-COPY "ddsketch/Cargo.toml" "ddsketch/"
-COPY "ddsketch-ffi/Cargo.toml" "ddsketch-ffi/"
+COPY "libdd-sketch/Cargo.toml" "libdd-sketch/"
+COPY "libdd-sketch-ffi/Cargo.toml" "libdd-sketch-ffi/"
 COPY "dogstatsd-client/Cargo.toml" "dogstatsd-client/"
 COPY "datadog-library-config-ffi/Cargo.toml" "datadog-library-config-ffi/"
 COPY "datadog-library-config/Cargo.toml" "datadog-library-config/"