Update dependency mkdocs-git-revision-date-localized-plugin to v0.12.1

Change-Id: Ib0ea4ed34eeda97de7fc118c98c0da8657ee961a
diff --git a/requirements.txt b/requirements.txt
index 541e744..b9633d0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1 @@
-mkdocs-git-revision-date-localized-plugin==0.10.3
+mkdocs-git-revision-date-localized-plugin==0.12.1