Revert "Merge pull request #107 from overleaf/sk-upgrade-jetty-2106"

This reverts commit f13d8a990a927f5983442ffce00ff009cdc0e8ab, reversing
changes made to cb3ba256b7b27e424616d7bc67b73385fef55be8.

services/git-bridge/pom.xml

@@ -76,13 +76,13 @@
         <dependency>
             <groupId>org.eclipse.jetty</groupId>
             <artifactId>jetty-servlet</artifactId>
-            <version>9.4.38.v20210224</version>
+            <version>9.4.8.v20171121</version>
         </dependency>
         <!-- https://mvnrepository.com/artifact/org.eclipse.jetty/jetty-server -->
         <dependency>
             <groupId>org.eclipse.jetty</groupId>
             <artifactId>jetty-server</artifactId>
-            <version>9.4.38.v20210224</version>
+            <version>9.4.8.v20171121</version>
         </dependency>
         <!-- https://mvnrepository.com/artifact/com.google.code.gson/gson -->
         <dependency>