Checksum of release archive has changed

### Describe the issue

This was originally reported as a [Meson WrapDB issue](https://github.com/mesonbuild/wrapdb/pull/884).

Basically downloading the release archive via [this link](https://github.com/abseil/abseil-cpp/archive/20220623.0.tar.gz) reports a different checksum now that it used to.

The checksum used to be 4208129b49006089ba1d6710845a45e31c59b0ab6bff9e5788a87f55c5abd602.

Now it is 46c6aaccd6808dbbe53dbc499b99fc2d736b64edca295ded2e82ab3da2915e6c.

Manually downloading the archive and computing the checksum gives the latter. However it definitely has been the former at some point, as our CI system is gated on successfully downloading and verifying the values.

### Steps to reproduce the problem

Download and run sha256sum on the file by hand.

### What version of Abseil are you using?

20220623.0

### What operating system and version are you using?

Ubuntu 22/10

### What compiler and version are you using?

Not relevant.

### What build system are you using?

Not relevant.

### Additional context

_No response_