I am uploading a NMU to fix this. The debdiff is attached.
diff -Nru libgsecuredelete-0.3/debian/changelog
libgsecuredelete-0.3/debian/changelog
--- libgsecuredelete-0.3/debian/changelog 2021-01-12 15:17:08.000000000
+0100
+++ libgsecuredelete-0.3/debian/changelog 2023-09-08 01:37:52.000000000
+0200
@@ -1,3 +1,10 @@
+libgsecuredelete (0.3-3.1) unstable; urgency=medium
+
+ * Non-maintainer upload
+ * Recommend pkexec instead of policykit-1 (Closes: #1025576)
+
+ -- Bastian Germann <b...@debian.org> Thu, 07 Sep 2023 23:37:52 +0000
+
libgsecuredelete (0.3-3) unstable; urgency=medium
* Patch gsecuredelete/Makefile.am to generate a proper valac call - Thanks
diff -Nru libgsecuredelete-0.3/debian/control
libgsecuredelete-0.3/debian/control
--- libgsecuredelete-0.3/debian/control 2021-01-12 13:27:25.000000000 +0100
+++ libgsecuredelete-0.3/debian/control 2023-09-08 01:37:29.000000000 +0200
@@ -20,7 +20,7 @@
${shlibs:Depends},
libglib2.0-0,
secure-delete
-Recommends: policykit-1
+Recommends: pkexec
Description: wrapper library for the secure-delete tools
GSecureDelete is a GObject wrapper library for the secure-delete tools
(srm, sfill, sswap and smem), aiming to ease use of these tool from programs
