[6.0.x] Added stub release notes and release date for 5.2.7, 5.1.13, and 4.2.25.

Backport of 00174507f8a91e9577ae233c58af561b379f2695 from main.

docs/releases/4.2.25.txt

@@ -0,0 +1,10 @@
+===========================
+Django 4.2.25 release notes
+===========================
+
+*October 1, 2025*
+
+Django 4.2.25 fixes one security issue with severity "high" and one security
+issue with severity "low" in 4.2.24.
+
+...

docs/releases/5.1.13.txt

@@ -0,0 +1,10 @@
+===========================
+Django 5.1.13 release notes
+===========================
+
+*October 1, 2025*
+
+Django 5.1.13 fixes one security issue with severity "high" and one security
+issue with severity "low" in 5.1.12.
+
+...

docs/releases/5.2.7.txt

@@ -2,10 +2,11 @@
 Django 5.2.7 release notes
 ==========================
 
-*Expected October 1, 2025*
+*October 1, 2025*
 
-Django 5.2.7 fixes several bugs in 5.2.6. Also, the latest string translations
+Django 5.2.7 fixes one security issue with severity "high", one security issue
-from Transifex are incorporated.
+with severity "low", and several bugs in 5.2.6. Also, the latest string
+translations from Transifex are incorporated.
 
 Bugfixes
 ========

docs/releases/index.txt

@@ -46,6 +46,7 @@ versions of the documentation contain the release notes for any later releases.
 .. toctree::
    :maxdepth: 1
 
+   5.1.13
    5.1.12
    5.1.11
    5.1.10
@@ -87,6 +88,7 @@ versions of the documentation contain the release notes for any later releases.
 .. toctree::
    :maxdepth: 1
 
+   4.2.25
    4.2.24
    4.2.23
    4.2.22