Fix deadlock_group query numbering label for 0-based qn

The CASE expression mapped qn=0 to "Query #1" but then used qn
directly for all other values, so qn=1 also displayed as "Query #1".
Replace the CASE with a simple qn + 1 conversion so labels are
always correct (qn=0 → "Query #1", qn=1 → "Query #2", etc).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: BrentOzar

sp_BlitzLock.sql

@@ -3765,11 +3765,8 @@ BEGIN
                         d.en
                     ) +
                     N', Query #'
-                    + CASE
-                          WHEN d.qn = 0
-                          THEN N'1'
-                          ELSE CONVERT(nvarchar(10), d.qn)
-                      END + CASE
+                    + CONVERT(nvarchar(10), d.qn + 1)
+                      + CASE
                                 WHEN d.is_victim = 1
                                 THEN N' - VICTIM'
                                 ELSE N''