[releng] Add missing sequence number bump to API baseline

Without this bump, Eclipse PDE can assume the contents hasn't changed
so will use the wrong baseline.

Change-Id: I02706b1277f9cfdd664c70b76832d6616e0fbf47
diff --git a/releng/org.eclipse.cdt.target/cdt-baseline.target b/releng/org.eclipse.cdt.target/cdt-baseline.target
index b015275..92acfe1 100644
--- a/releng/org.eclipse.cdt.target/cdt-baseline.target
+++ b/releng/org.eclipse.cdt.target/cdt-baseline.target
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <?pde version="3.8"?>
-<target name="cdt-baseline" sequenceNumber="28">
+<target name="cdt-baseline" sequenceNumber="29">
 <locations>
 <location includeAllPlatforms="false" includeConfigurePhase="true" includeMode="planner" includeSource="true" type="InstallableUnit">
 <repository location="https://download.eclipse.org/eclipse/updates/4.19/R-4.19-202103031800/"/>