Fix build paths

Author: benjeffery

.github/workflows/build-docs.yml

@@ -46,6 +46,7 @@ jobs:
 
           - package: tscompare
             cache-version: v1
+            requirements-path: requirements/CI-docs-pip/requirements.txt
 
           - package: tsbrowse
             cache-version: v2
@@ -57,6 +58,7 @@ jobs:
 
           - package: tsdate
             cache-version: v8
+            requirements-path: docs/requirements.txt
 
           - package: tszip
             cache-version: v2