Kubernetes CRD documentation fixes

docs/content/middlewares/maxconnection.md

@@ -19,10 +19,10 @@ labels:
 apiVersion: traefik.containo.us/v1alpha1
 kind: Middleware
 metadata:
-  name: addprefix
+  name: test-maxconn
 spec:
-  addPrefix:
-    prefix: /bar
+  maxConn:
+    amount: 10
 ```
 
 ```json tab="Marathon"

docs/content/middlewares/ratelimit.md

@@ -32,15 +32,16 @@ metadata:
   name: test-ratelimit
 spec:
   rateLimit:
-    extractorfunc = "client.ip"
+    extractorFunc: client.ip
+    rateset:
       rate0:
-        period = "10s"
-        average = 100
-        burst = 200
+          period: 10s
+          average: 100
+          burst: 200
       rate1:
-        period = "3s"
-        average = 5
-        burst = 10
+          period: 3s
+          average: 5
+          burst: 10
 ```
 
 ```json tab="Marathon"

docs/content/middlewares/stripprefixregex.md

@@ -1,4 +1,4 @@
-# StripPrefix
+# StripPrefixRegex
 
 Removing Prefixes From the Path Before Forwarding the Request (Using a Regex)
 {: .subtitle }