fix: pom.xml to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JAVA-COMITEXTPDF-2320389
- https://snyk.io/vuln/SNYK-JAVA-ORGAPACHETOMCATEMBED-7430175
- https://snyk.io/vuln/SNYK-JAVA-ORGBOUNCYCASTLE-6613077
- https://snyk.io/vuln/SNYK-JAVA-ORGSPRINGFRAMEWORK-6444790
- https://snyk.io/vuln/SNYK-JAVA-ORGBOUNCYCASTLE-2848001
- https://snyk.io/vuln/SNYK-JAVA-COMITEXTPDF-541282
- https://snyk.io/vuln/SNYK-JAVA-COMGOOGLECODEGSON-1730327
- https://snyk.io/vuln/SNYK-JAVA-COMITEXTPDF-541284
- https://snyk.io/vuln/SNYK-JAVA-COMBEUST-174815
- https://snyk.io/vuln/SNYK-JAVA-ORGSPRINGFRAMEWORK-6597980
- https://snyk.io/vuln/SNYK-JAVA-ORGBOUNCYCASTLE-6613078
- https://snyk.io/vuln/SNYK-JAVA-ORGBOUNCYCASTLE-5771489
- https://snyk.io/vuln/SNYK-JAVA-COMITEXTPDF-2391484
- https://snyk.io/vuln/SNYK-JAVA-COMITEXTPDF-2391485
- https://snyk.io/vuln/SNYK-JAVA-COMITEXTPDF-2391486

pom.xml

@@ -49,15 +49,15 @@
         <io.micrometer.prometheus.version>1.4.2</io.micrometer.prometheus.version>
         <gson.version>2.8.4</gson.version>
         <kernel.websub.version>1.2.1-SNAPSHOT</kernel.websub.version>
-		<itextcore.version>7.1.0</itextcore.version>
+		<itextcore.version>7.2.4</itextcore.version>
 		<itexthtml2pdf.version>2.0.0</itexthtml2pdf.version>
 		<itext.version>5.5.13</itext.version>
 		<commons-math3>3.6.1</commons-math3>
 		<commons-io>2.6</commons-io>
 		<commons-codec>1.11</commons-codec>
-		<bouncycastle.version>1.68</bouncycastle.version>
+		<bouncycastle.version>1.78</bouncycastle.version>
 		<jwt.version> 3.8.1</jwt.version>
-		<google.zxing.version>3.3.3</google.zxing.version>
+		<google.zxing.version>3.4.1</google.zxing.version>
 	</properties>
 	<dependencyManagement>
 		<dependencies>