Add certManager option to tilt.yaml helm chart (#2233)

The tls flags are required if metrics-bind-address is set. Adding the
certManager option to the tilt.yaml chart makes Tilt work again.

Also fixed a couple spelling errors.

Author: trgeiger

helm/tilt.yaml

@@ -2,10 +2,12 @@
 # This is a YAML-formatted file.
 # Declare variables to be passed into your templates.
 
-# Tilt is an exeption to the multi-values case,
-# as the Tilt runner only accepts a single values fle
+# Tilt is an exception to the multi-values case,
+# as the Tilt runner only accepts a single values file
 
 options:
+  certManager:
+    enabled: true
   tilt:
     enabled: true
   featureSet: experimental