docs: wrap long line for better readability

Signed-off-by: Kefu Chai <kefu.chai@scylladb.com>
(cherry picked from commit 6a5d3a7)

Author: tchaikov

docs/source/conf.py

@@ -15,7 +15,19 @@
 
 # Build documentation for the following tags and branches
 TAGS = []
-BRANCHES = ['scylla-3.7.2.x', 'scylla-3.10.2.x', 'scylla-3.11.0.x', 'scylla-3.11.2.x', 'scylla-4.7.2.x', 'scylla-4.10.0.x', 'scylla-4.11.1.x', 'scylla-4.12.0.x', 'scylla-4.13.0.x', 'scylla-4.14.1.x', 'scylla-4.15.0.x']
+BRANCHES = [
+    'scylla-3.7.2.x',
+    'scylla-3.10.2.x',
+    'scylla-3.11.0.x',
+    'scylla-3.11.2.x',
+    'scylla-4.7.2.x',
+    'scylla-4.10.0.x',
+    'scylla-4.11.1.x',
+    'scylla-4.12.0.x',
+    'scylla-4.13.0.x',
+    'scylla-4.14.1.x',
+    'scylla-4.15.0.x'
+]
 # Set the latest version.
 LATEST_VERSION = 'scylla-4.15.0.x'
 # Set which versions are not released yet.