Rename file name for trait "cpusclaer" and "scaler" (#1617)

As the file name (.cue/.yaml) of trait "cpusclaer" and "scaler"
are "cpuhpa" and "manaualscale" respectively, renmae them in
order to avoid confustions

charts/vela-core/templates/defwithtemplate/cpuscaler.yaml

@@ -13,7 +13,7 @@ spec:
   schematic:
     cue:
       template: |
-        outputs: cpuhpa: {
+        outputs: cpuscaler: {
         	apiVersion: "autoscaling/v2beta2"
         	kind:       "HorizontalPodAutoscaler"
         	metadata: name: context.name

docs/sidebars.js

@@ -36,7 +36,7 @@ module.exports = {
         {
           'Traits': [
             'end-user/traits/ingress',
-            'end-user/traits/scale',
+            'end-user/traits/scaler',
             'end-user/traits/labels',
             'end-user/traits/sidecar',
             'end-user/traits/volumes',

hack/vela-templates/cue/cpuscaler.cue

@@ -1,4 +1,4 @@
-outputs: cpuhpa: {
+outputs: cpuscaler: {
 	apiVersion: "autoscaling/v2beta2"
 	kind:       "HorizontalPodAutoscaler"
 	metadata: name: context.name