docs(paths): adds aliase for rpm and debian install

got reports on twitter about broken links.

docs/sources/installation/debian.md

@@ -3,7 +3,7 @@ title = "Installing on Debian / Ubuntu"
 description = "Install guide for Grafana"
 keywords = ["grafana", "installation", "documentation"]
 type = "docs"
-aliases = ["/installation/installation/"]
+aliases = ["/installation/installation/debian"]
 [menu.docs]
 name = "Installing on Ubuntu / Debian"
 identifier = "debian"

docs/sources/installation/index.md

@@ -3,6 +3,7 @@ title = "Installation"
 description = "Install guide for Grafana"
 keywords = ["grafana", "installation", "documentation"]
 type = "docs"
+aliases = ["installation/installation"]
 [menu.docs]
 name = "Installation"
 identifier = "installation"

docs/sources/installation/rpm.md

@@ -2,6 +2,7 @@
 title = "Installing on RPM-based Linux"
 description = "Grafana Installation guide for Centos, Fedora, OpenSuse, Redhat."
 keywords = ["grafana", "installation", "documentation", "centos", "fedora", "opensuse", "redhat"]
+aliases = ["installation/installation/rpm"]
 type = "docs"
 [menu.docs]
 name = "Installing on Centos / Redhat"