PDFBOX-5660: update bc

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/branches/3.0@1916842 13f79535-47bb-0310-9956-ffa450edef68

Author: THausherr

pom.xml

@@ -55,7 +55,7 @@
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 
-    <bouncycastle.version>1.77</bouncycastle.version>
+    <bouncycastle.version>1.78</bouncycastle.version>
     <junit.version>5.10.2</junit.version>
     <jbig2.version>3.0.4</jbig2.version>
     <jai.version>1.4.0</jai.version>