Update pandoc/core Docker tag to v2.19

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
pandoc/core	docker	minor	2.14 -> 2.19

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR has been generated by Mend Renovate. View repository job log here.

[codecov-commenter]

Codecov Report

Merging #357 (9903091) into main (762996a) will increase coverage by 0.63%.
The diff coverage is n/a.

📣 This organization is not using Codecov’s GitHub App Integration. We recommend you install it so Codecov can continue to function properly for your repositories. Learn more

@@             Coverage Diff              @@
##               main     #357      +/-   ##
============================================
+ Coverage     77.42%   78.06%   +0.63%     
- Complexity      454      457       +3     
============================================
  Files            86       86              
  Lines          1094     1094              
  Branches         72       72              
============================================
+ Hits            847      854       +7     
+ Misses          208      204       -4     
+ Partials         39       36       -3     

see 1 file with indirect coverage changes