Lowercase blog post slug

Author: armanbilge

build.scala

@@ -542,7 +542,7 @@ object Redirects {
     "/blog/2019/05/01/typelevel-switches-to-scala-code-of-conduct.html" -> "/blog/typelevel-switches-to-scala-code-of-conduct.md",
     "/blog/2019/05/29/support-typelevel-thanks-to-triplequote-hydra.html" -> "/blog/support-typelevel-thanks-to-triplequote-hydra.md",
     "/blog/2019/09/05/jdg.html" -> "/blog/jdg.md",
-    "/blog/2019/11/13/Update-about-sustainability-program.html" -> "/blog/Update-about-sustainability-program.md",
+    "/blog/2019/11/13/Update-about-sustainability-program.html" -> "/blog/update-about-sustainability-program.md",
     "/blog/2020/06/17/confronting-racism.html" -> "/blog/confronting-racism.md",
     "/blog/2020/10/30/concurrency-in-ce3.html" -> "/blog/concurrency-in-ce3.md",
     "/blog/2021/02/21/fibers-fast-mkay.html" -> "/blog/fibers-fast-mkay.md",
@@ -574,6 +574,7 @@ object Redirects {
     "/blog/social/index.html" -> "/blog/README.md",
     "/blog/technical/index.html" -> "/blog/README.md",
     "/blog/summits/index.html" -> "/blog/README.md",
+    "/blog/Update-about-sustainability-program.html" -> "/blog/update-about-sustainability-program.md",
     "/code-of-conduct.html" -> "/code-of-conduct/README.md",
     "/conduct.html" -> "/code-of-conduct/README.md",
     "/event/2016-03-summit-philadelphia/index.html" -> "/blog/summit-philadelphia-2016-03-02.md",