Update milvusdb/milvus Docker tag to v2.4.4

This MR contains the following updates:

Package	Type	Update	Change
milvusdb/milvus	ironbank-docker	patch	v2.4.1-gpu -> v2.4.4-gpu
milvusdb/milvus	stage	patch	v2.4.1-gpu -> v2.4.4-gpu

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