fix: pom.xml to reduce vulnerabilities (#694)

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JAVA-ORGAPACHEHTTPCOMPONENTS-1048058

Co-authored-by: snyk-bot <snyk-bot@snyk.io>

Author: svcprodsec-sendgrid

pom.xml

@@ -286,7 +286,7 @@
     <dependency>
       <groupId>com.sendgrid</groupId>
       <artifactId>java-http-client</artifactId>
-      <version>4.3.6</version>
+      <version>4.3.7</version>
     </dependency>
     <dependency>
       <groupId>com.fasterxml.jackson.core</groupId>