Publish binaries from latest build action to release tag "volatile"

[TG9541]

Sometimes it would be nice to just have those artifacts...

[TG9541]

It's maybe not the most obvious way to do it but I decided "attach" the release info in the build step at the end of forth.asm. That way all release artifacts files contain version information, one way or the other:

stm8ef-bin.tgz and stm8ef-bin.zip in forth.asm:

; ##########################################
; # Release info added by GitHub action:
; #   repository:   TG9541/stm8ef
; #   branch name:  refs/heads/master
; #   sha:   8ee3453ce577181ef5e9bddda94f56d448dbf962
; ##########################################

stm8ef-rst.tgz in any forth.rst file:

                                   4148 ; ##########################################
                                   4149 ; # Release info added by GitHub action:
                                   4150 ; #   repository:   TG9541/stm8ef
                                   4151 ; #   branch name:  refs/heads/master
                                   4152 ; #   sha:   8ee3453ce577181ef5e9bddda94f56d448dbf962
                                   4153 ; ##########################################

That way it's easy to distinguish a copy of forth.asm from a release archive from a version controlled development file.