build_release_template.yml: Chomp the prefixing 'v' from the release branch

[ibuclaw]

Windows release build currently fails because the 7z file doesn't exist.

7-Zip 26.00 (x64) : Copyright (c) 1999-2026 Igor Pavlov : 2026-02-12

ERROR: The system cannot find the file specified.
create_dmd_release\build\dmd.v2.112.1-rc.1.windows.7z

This is because build_all calls chompPrefix("v") on the version string before using it in all archive names.

Copying file 'C:\Users\RUNNER~1\AppData\Local\Temp\tmp.8319A2/dmd.2.112.1-rc.1.windows.zip' to 'build/dmd.2.112.1-rc.1.windows.zip'.
Building LZMA archive 'build/dmd.2.112.1-rc.1.windows.7z'.

I don't understand batch script, so this may be completely off the mark.

@rainers ? @kinke ?

[dlang-bot]

Thanks for your pull request, @ibuclaw!

Bugzilla references

Your PR doesn't reference any Bugzilla issue.

If your PR contains non-trivial changes, please reference a Bugzilla issue or create a manual changelog.

[ibuclaw]

Guess worse it can do is not work, if so, revert :-)

[kinke]

Should be fine. :)

[ibuclaw]

Should be fine. :)

Apparently it was! 🥳

https://github.com/dlang/dmd/actions/runs/22625433986

Only blocked on dlang/dmd#22686 I think.