HDDS-8843. Bump RocksDB to 7.7.3 (#20)

diff --git a/Dockerfile b/Dockerfile
index a6ae207..e0cb2f2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -63,7 +63,7 @@
       && make install \
       && cd .. \
       && rm -r zstd-${ZSTD_VER}
-RUN export ROCKSDB_VER=7.0.4 \
+RUN export ROCKSDB_VER=7.7.3 \
       && curl -LSs https://github.com/facebook/rocksdb/archive/v${ROCKSDB_VER}.tar.gz | tar zxv \
       && mv rocksdb-${ROCKSDB_VER} rocksdb \
       && cd rocksdb \