Update some refs.

Signed-off-by: Jason Tang <[email protected]>

Author: jastang

content/master/guides/extensions-release-process.md

@@ -26,7 +26,7 @@ uses today.
 
 {{< hint "tip" >}}
 For more information about Crossplane packages, review the
-[xpkg concepts]({{<ref "../../master/concepts/packages" >}}).
+[xpkg concepts]({{<ref "../concepts/packages" >}}).
 {{< /hint >}}
 
 ## Typical workflow

content/v1.18/guides/extensions-release-process.md

@@ -26,7 +26,7 @@ uses today.
 
 {{< hint "tip" >}}
 For more information about Crossplane packages, review the
-[xpkg concepts]({{<ref "../../master/concepts/packages" >}}).
+[xpkg concepts]({{<ref "../concepts/packages" >}}).
 {{< /hint >}}
 
 ## Typical workflow

content/v1.19/guides/extensions-release-process.md

@@ -26,7 +26,7 @@ uses today.
 
 {{< hint "tip" >}}
 For more information about Crossplane packages, review the
-[xpkg concepts]({{<ref "../../master/concepts/packages" >}}).
+[xpkg concepts]({{<ref "../concepts/packages" >}}).
 {{< /hint >}}
 
 ## Typical workflow

content/v1.20/guides/extensions-release-process.md

@@ -26,7 +26,7 @@ uses today.
 
 {{< hint "tip" >}}
 For more information about Crossplane packages, review the
-[xpkg concepts]({{<ref "../../master/concepts/packages" >}}).
+[xpkg concepts]({{<ref "../concepts/packages" >}}).
 {{< /hint >}}
 
 ## Typical workflow

content/v2.0-preview/guides/extensions-release-process.md

@@ -26,7 +26,7 @@ uses today.
 
 {{< hint "tip" >}}
 For more information about Crossplane packages, review the
-[xpkg concepts]({{<ref "../../master/concepts/packages" >}}).
+[xpkg concepts]({{<ref "../packages" >}}).
 {{< /hint >}}
 
 ## Typical workflow