Expect test failure for pandoc version 3.8.2.1.

Author: alaendle

build-constraints.yaml

@@ -8065,6 +8065,7 @@ expected-test-failures:
     - lsfrom # test: lsfrom does not exist (No such file or directory)
     - markov-chain-usage-model # https://github.com/advancedtelematic/markov-chain-usage-model/issues/44
     - monad-logger-aeson # 0.4.1.3 ghc-9.10.1
+    - pandoc # 3.8.2.1
     - pvar # 1.0.0.0 ghc-9.6
     - read-env-var # 1.0.0.0 https://github.com/cdepillabout/read-env-var/issues/2
     - regex-tdfa # 1.3.2.4 doctest-0.4