[gimp] devel-docs: in performance-logs.md, fix markers-page section number

[Ell <ell src gnome org>]

commit 4fefa44574f192f7738a7783df44182f425b0f80
Author: Ell <ell_se yahoo com>
Date:   Wed Jan 23 16:35:18 2019 -0500

    devel-docs: in performance-logs.md, fix markers-page section number

 devel-docs/performance-logs/performance-logs.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/devel-docs/performance-logs/performance-logs.md b/devel-docs/performance-logs/performance-logs.md
index 6efff2897e..97f1108086 100644
--- a/devel-docs/performance-logs/performance-logs.md
+++ b/devel-docs/performance-logs/performance-logs.md
@@ -250,7 +250,7 @@ associated with any sample, including:
 
 The key/value lists are searchable by key name.
 
-#### 4.2.4. Markers Page
+#### 4.2.2. Markers Page
 
 The *markers page* lists the event markers contained in the log, displaying
 their number, relative time, and description.