docs: do not create CVE.html when processing doc for release

CVE.html is only needed for non-release docs. Since the doc directory
is only processed directly for releases, the CVE.txt file should be
ignored/excluded.

Author: rouilj

doc/conf.py

@@ -101,7 +101,7 @@
 # see https://issues.roundup-tracker.org/issue2550907:
 exclude_patterns = ['_build', 'tracker_config.txt',
                     'announcement.txt', 'whatsnew-0.7.txt',
-                    'whatsnew-0.8.txt']
+                    'whatsnew-0.8.txt', 'CVE.txt']
 
 # The reST default role (used for this markup: `text`) to use for all
 # documents.