Revert "Bump docs version following 1.6 branch"

This reverts commit 2ef7dbd.

Author: Mats-SX

doc/antora.yml

@@ -1,10 +1,10 @@
 name: graph-data-science-client
 title: Neo4j Graph Data Science Client
-version: '1.7'
-display_version: '1.7-preview'
+version: '1.6'
+display_version: '1.6'
 start_page: ROOT:index.adoc
 nav:
 - modules/ROOT/content-nav.adoc
 asciidoc:
   attributes:
-    docs-version: '1.7'
+    docs-version: '1.6'

doc/publish.yml

@@ -7,7 +7,7 @@ content:
   sources:
   - url: ../
     start_path: doc
-    branches: ['1.2', '1.3', '1.4', '1.5', '1.6', 'main']
+    branches: ['1.2', '1.3', '1.4', '1.5', 'main']
     include: doc/
     exclude:
     - '!**/_includes/*'

graphdatascience/version.py

@@ -1 +1 @@
-__version__ = "1.7a1"
+__version__ = "1.6"