Uniref md5sum file has incorrect files

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[download_uniref30.sh](https://github.com/deepmind/alphafold/blob/6a3af1adb3bbbc53562da100e3819b2fc882f915/scripts/download_uniref30.sh#L36
) downloads uniref from March of 2021 using the mirror at https://storage.googleapis.com/alphafold-databases/v2.3/UniRef30_2021_03.tar.gz.

Within is the file UniRef30_2021_03.md5sums whose contents is:

```
bdd865b81d9706697e9132cc8d7f0703 UniRef30_2021_06_hhm.ffindex
986c539ddffe2c3f50c7484a4ad61b79 UniRef30_2021_06_cs219.ffindex
69c34fb666cf17a75930b0eeaf5ecc7b UniRef30_2021_06_a3m.ffindex
efbf1cff1435581d844487b283ea1c3d UniRef30_2021_06_cs219.ffdata
b8eab068f312dd3fb8e706dec372e4e6 UniRef30_2021_06_hhm.ffdata
b874491aa909b7e360f046c871a7752f UniRef30_2021_06_a3m.ffdata
```

Note that the files are from June 2021 rather than March.
I did check the md5sum of the files and the checksums all match.

Is the md5sum file using the incorrect dates?

Also, in terms or reproducibility I'm curious if the uniref database should be March or in fact these from June.