setup-tinytex action documentation has wrong version info

[jtbayly]

At least on MacOS, the following from the documentation doesn't work right:

      - uses: r-lib/actions/setup-tinytex@v2
        env:
          # always install the bundled version from Nov. 2021
          TINYTEX_VERSION: 2021-11

The correct version uses a period instead of a dash, like so:

          TINYTEX_VERSION: 2021.11

Unfortunately, this took me a long time to track down, in part because the action doesn't realize that it failed. Here's the job output for my step installing TinyTeX:

Run r-lib/actions/setup-tinytex@v[2](https://github.com/warhornmedia/bannerman-sacraments/runs/5233678630?check_suite_focus=true#step:5:2)
2
  env:
[3](https://github.com/warhornmedia/bannerman-sacraments/runs/5233678630?check_suite_focus=true#step:5:3)
    R_LIBS_USER: /Users/runner/work/_temp/Library
[4](https://github.com/warhornmedia/bannerman-sacraments/runs/5233678630?check_suite_focus=true#step:5:4)
    TZ: UTC
[5](https://github.com/warhornmedia/bannerman-sacraments/runs/5233678630?check_suite_focus=true#step:5:5)
    _R_CHECK_SYSTEM_CLOCK_: FALSE
[6](https://github.com/warhornmedia/bannerman-sacraments/runs/5233678630?check_suite_focus=true#step:5:6)
    NOT_CRAN: true
[7](https://github.com/warhornmedia/bannerman-sacraments/runs/5233678630?check_suite_focus=true#step:5:7)
    TINYTEX_VERSION: 2021-11
[8](https://github.com/warhornmedia/bannerman-sacraments/runs/5233678630?check_suite_focus=true#step:5:8)
sh /Users/runner/work/_temp/install-unx.sh
[9](https://github.com/warhornmedia/bannerman-sacraments/runs/5233678630?check_suite_focus=true#step:5:9)
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
[10](https://github.com/warhornmedia/bannerman-sacraments/runs/5233678630?check_suite_focus=true#step:5:10)
                                 Dload  Upload   Total   Spent    Left  Speed
[11](https://github.com/warhornmedia/bannerman-sacraments/runs/5233678630?check_suite_focus=true#step:5:11)

[12](https://github.com/warhornmedia/bannerman-sacraments/runs/5233678630?check_suite_focus=true#step:5:12)
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
[13](https://github.com/warhornmedia/bannerman-sacraments/runs/5233678630?check_suite_focus=true#step:5:13)
100     9  100     9    0     0     60      0 --:--:-- --:--:-- --:--:--    62
[14](https://github.com/warhornmedia/bannerman-sacraments/runs/5233678630?check_suite_focus=true#step:5:14)
tar: Error opening archive: Unrecognized archive format
[15](https://github.com/warhornmedia/bannerman-sacraments/runs/5233678630?check_suite_focus=true#step:5:15)
/Users/runner/work/_temp/install-unx.sh: line 59: cd: /Users/runner/Library/TinyTeX/bin/*/: No such file or directory
[16](https://github.com/warhornmedia/bannerman-sacraments/runs/5233678630?check_suite_focus=true#step:5:16)
/Users/runner/work/_temp/install-unx.sh: line 61: ./tlmgr: No such file or directory
[17](https://github.com/warhornmedia/bannerman-sacraments/runs/5233678630?check_suite_focus=true#step:5:17)
/Users/runner/work/_temp/install-unx.sh: line 63: ./tlmgr: No such file or directory
[18](https://github.com/warhornmedia/bannerman-sacraments/runs/5233678630?check_suite_focus=true#step:5:18)
(node:1597) UnhandledPromiseRejectionWarning: Failed to install TinyTeX: Error: The process 'sh' failed with exit code 127
[19](https://github.com/warhornmedia/bannerman-sacraments/runs/5233678630?check_suite_focus=true#step:5:19)
(node:1597) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
[20](https://github.com/warhornmedia/bannerman-sacraments/runs/5233678630?check_suite_focus=true#step:5:20)
(node:1597) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

The workflow should have failed right there, but instead it failed several steps later when it attempted to use TinyTeX.

[gaborcsardi]

Thanks! Do you want to submit a PR against the v2-branch branch?

[jtbayly]

I was going to, but I wasn't sure if the second part of my issue should also be addressed?

[jtbayly]

(Just to be clear, I could easily fix the first part, but the second part is way beyond me.)

[gaborcsardi]

Yes, fixing the docs would be nice, thanks! (But no pressure.)

[gaborcsardi]

Actually, I am fixing the second issue, so never mind. :)

[gaborcsardi]

OK, the error messages are still not great because the install script does not stop at the failed download, but at least the action fails now: https://github.com/r-lib/actions/runs/5246523414?check_suite_focus=true

This will be in v2 later today.

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