chore: regens API reference docs (#889)

diff --git a/docs/dyn/books_v1.personalizedstream.html b/docs/dyn/books_v1.personalizedstream.html
index 1c230be..2fc179b 100644
--- a/docs/dyn/books_v1.personalizedstream.html
+++ b/docs/dyn/books_v1.personalizedstream.html
@@ -214,7 +214,7 @@
                 "height": "A String", # Height or length of this volume (in cm).
               },
               "previewLink": "A String", # URL to preview this volume on the Google Books site.
-              "contentVersion": "A String", # An identifier for the version of the volume content (text & images). (In LITE projection)
+              "contentVersion": "A String", # An identifier for the version of the volume content (text & images). (In LITE projection)
               "industryIdentifiers": [ # Industry standard identifiers for this volume.
                 {
                   "identifier": "A String", # Industry specific volume identifier.