I am uploading a NMU in order to fix this.
The debdiff is attached.
diff -Nru plank-0.11.89/debian/changelog plank-0.11.89/debian/changelog
--- plank-0.11.89/debian/changelog 2021-11-16 16:11:07.000000000 +0100
+++ plank-0.11.89/debian/changelog 2023-10-21 12:07:51.000000000 +0200
@@ -1,3 +1,10 @@
+plank (0.11.89-4.1) unstable; urgency=medium
+
+ * Non-maintainer upload.
+ * Replace transitional libgdk-pixbuf2.0-dev dependency. (Closes: #1037366)
+
+ -- Bastian Germann <b...@debian.org> Sat, 21 Oct 2023 12:07:51 +0200
+
plank (0.11.89-4) unstable; urgency=medium
[ Mike Gabriel ]
diff -Nru plank-0.11.89/debian/control plank-0.11.89/debian/control
--- plank-0.11.89/debian/control 2021-08-21 12:29:38.000000000 +0200
+++ plank-0.11.89/debian/control 2023-10-21 12:07:51.000000000 +0200
@@ -69,7 +69,7 @@
Depends: libplank1 (= ${binary:Version}),
libbamf3-dev (>= 0.2.92),
libcairo2-dev (>= 1.10.0),
- libgdk-pixbuf2.0-dev (>= 2.26.0),
+ libgdk-pixbuf-2.0-dev (>= 2.26.0),
libgee-0.8-dev,
libglib2.0-dev (>= 2.40.0),
libgtk-3-dev (>= 3.10.0),
