Create build-artifacts on release

[Harm133]

Only build artifacts on published release.

As of now the artifacts are never created as the branch must be "main" on line 9 but must not be "main" on line 63.

fixes #71
fixes #74
fixes #122
fixes #132

[sigaloid]

Devastatingly simple fix. Thanks

[kevinsumner]

It appears the Docker builds referenced in the four fixes Issues aren't actually fixed. Building locally, after a fresh pull of main:

~/projects/redlib ‹main›
zsh$ docker build --build-arg TARGET=v0.34.0 .
[+] Building 2.0s (6/7)                                               docker:default
 => [internal] load build definition from Dockerfile                            0.0s
 => => transferring dockerfile: 612B                                            0.0s
 => [internal] load metadata for docker.io/library/alpine:3.19                  0.1s
 => [internal] load .dockerignore                                               0.0s
 => => transferring context: 2B                                                 0.0s
 => CACHED [1/4] FROM docker.io/library/alpine:3.19@sha256:c5b1261d6d3e4307162  0.0s
 => [2/4] RUN apk add --no-cache curl                                           0.9s
 => ERROR [3/4] RUN curl -L https://github.com/redlib-org/redlib/releases/late  1.0s
------
 > [3/4] RUN curl -L https://github.com/redlib-org/redlib/releases/latest/download/redlib-v0.34.0.tar.gz |     tar xz -C /usr/local/bin/:
0.282   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
0.282                                  Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
100     9  100     9    0     0     12      0 --:--:-- --:--:-- --:--:--    12
1.000 tar: invalid magic
1.000 tar: short read
------
Dockerfile:7
--------------------
   6 |
   7 | >>> RUN curl -L https://github.com/redlib-org/redlib/releases/latest/download/redlib-${TARGET}.tar.gz | \
   8 | >>>     tar xz -C /usr/local/bin/
   9 |
--------------------
ERROR: failed to solve: process "/bin/sh -c curl -L https://github.com/redlib-org/redlib/releases/latest/download/redlib-${TARGET}.tar.gz |     tar xz -C /usr/local/bin/" did not complete successfully: exit code: 1

If I get time tonight, I'll put in a PR for it.

[kevinsumner]

Nevermind, that was my own PEBKAC (TARGET is the Rust target). This looks good.