Update esy lock and esy workflow

The esy workflow was failing to find the odoc binary, despite having
built it. I'm unsure what the cause of this is, and the workaround
is suspicious, but does seems to work.

Signed-off-by: Jon Ludlam <[email protected]>

Author: jonludlam

.github/workflows/build.yml

@@ -94,4 +94,4 @@ jobs:
         run: esy install --verbose
 
       - name: Build odoc
-        run: esy odoc --version
+        run: esy x dune exec src/odoc/bin/main.exe -- --version