dependencies: bump heti and statistics version

Author: TonyCrane

requirements.txt

@@ -1,5 +1,5 @@
 mkdocs~=1.6.1
 mkdocs-material~=9.6.15
 mkdocs-material-extensions~=1.3.1
-mkdocs-heti-plugin==0.1.5
-mkdocs-statistics-plugin==0.1.2
+mkdocs-heti-plugin==0.1.6
+mkdocs-statistics-plugin==0.1.4