vuln-fix: Use HTTPS instead of HTTP to resolve deps CVE-2021-26291

This fixes a security vulnerability in this project where the `pom.xml`
files were configuring Maven to resolve dependencies over HTTP instead of
HTTPS.

Weakness: CWE-829: Inclusion of Functionality from Untrusted Control Sphere
Severity: High
CVSSS: 8.1
Detection: CodeQL & OpenRewrite (https://public.moderne.io/recipes/org.openrewrite.maven.security.UseHttpsForRepositories)

Reported-by: Jonathan Leitschuh <Jonathan.Leitschuh@gmail.com>
Signed-off-by: Jonathan Leitschuh <Jonathan.Leitschuh@gmail.com>

Bug-tracker: JLLeitschuh/security-research#8

Co-authored-by: Moderne <team@moderne.io>

pom.xml

@@ -8,7 +8,7 @@
   <repositories>
     <repository>
       <id>Akka repository</id>
-      <url>http://repo.akka.io/releases</url>
+      <url>https://repo.akka.io/releases</url>
     </repository>
     <repository>
       <id>scala-tools</id>
@@ -20,11 +20,11 @@
     </repository>
     <repository>
       <id>twitter</id>
-      <url>http://maven.twttr.com/</url>
+      <url>https://maven.twttr.com/</url>
     </repository>
     <repository>
       <id>central2</id>
-      <url>http://central.maven.org/maven2/</url>
+      <url>https://central.maven.org/maven2/</url>
     </repository>
   </repositories>
   <dependencies>