I am uploading a NMU to DELAYED/10 in order to fix this.
The debdiff is attached.
diff -Nru checksecurity-2.0.16+nmu3/debian/changelog
checksecurity-2.0.16+nmu4/debian/changelog
--- checksecurity-2.0.16+nmu3/debian/changelog 2021-12-26 00:56:10.000000000
+0000
+++ checksecurity-2.0.16+nmu4/debian/changelog 2023-10-13 19:08:08.000000000
+0000
@@ -1,3 +1,10 @@
+checksecurity (2.0.16+nmu4) unstable; urgency=medium
+
+ * Non-maintainer upload.
+ * Convert to source format 3.0. (Closes: #1007335)
+
+ -- Bastian Germann <[email protected]> Fri, 13 Oct 2023 19:08:08 +0000
+
checksecurity (2.0.16+nmu3) unstable; urgency=medium
* Non-maintainer upload.
diff -Nru checksecurity-2.0.16+nmu3/debian/source/format
checksecurity-2.0.16+nmu4/debian/source/format
--- checksecurity-2.0.16+nmu3/debian/source/format 1970-01-01
00:00:00.000000000 +0000
+++ checksecurity-2.0.16+nmu4/debian/source/format 2023-10-13
19:07:40.000000000 +0000
@@ -0,0 +1 @@
+3.0 (native)
