Fix link to bootstrap customization guide

The re-organization that happened as part of #1573 removed this page.

PR #1573 added a redirect for /flux/cheatsheets/bootstrap but in this
case it's better to specifically link directly to the customization
guide instead of the general configuration page.

closes #1658

Signed-off-by: Max Jonas Werner <mail@makk.es>

Author: Max Jonas Werner

content/en/flux/components/helm/options.md

@@ -6,7 +6,7 @@ weight: 1
 ---
 
 To customise the controller options at install time,
-please see the [bootstrap cheatsheet](../../cheatsheets/bootstrap.md).
+please see the [bootstrap customization guide](/flux/installation/configuration/boostrap-customization/).
 
 ## Flags
 

content/en/flux/components/image/options.md

@@ -6,7 +6,7 @@ weight: 1
 ---
 
 To customise the controller options at install time,
-please see the [bootstrap cheatsheet](../../cheatsheets/bootstrap.md).
+please see the [bootstrap customization guide](/flux/installation/configuration/boostrap-customization/).
 
 ## Image automation flags
 

content/en/flux/components/kustomize/options.md

@@ -6,7 +6,7 @@ weight: 1
 ---
 
 To customise the controller options at install time,
-please see the [bootstrap cheatsheet](../../cheatsheets/bootstrap.md).
+please see the [bootstrap customization guide](/flux/installation/configuration/boostrap-customization/).
 
 ## Flags
 

content/en/flux/components/notification/options.md

@@ -6,7 +6,7 @@ weight: 1
 ---
 
 To customise the controller options at install time,
-please see the [bootstrap cheatsheet](../../cheatsheets/bootstrap.md).
+please see the [bootstrap customization guide](/flux/installation/configuration/boostrap-customization/).
 
 ## Flags
 

content/en/flux/components/source/options.md

@@ -6,7 +6,7 @@ weight: 1
 ---
 
 To customise the controller options at install time,
-please see the [bootstrap cheatsheet](../../cheatsheets/bootstrap.md).
+please see the [bootstrap customization guide](/flux/installation/configuration/boostrap-customization/).
 
 ## Flags