Add CNCF Landscape update howto (#610)

* Add CNCF Landscape update howto

Signed-off-by: Jorge O. Castro <[email protected]>

* Add more language around new additions

Signed-off-by: Jeffrey Sica <[email protected]>

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Signed-off-by: Jorge O. Castro <[email protected]>
Signed-off-by: Jeffrey Sica <[email protected]>
Co-authored-by: Jeffrey Sica <[email protected]>

Author: castrojo

website/content/resources/how-to/update-

@@ -0,0 +1,9 @@
+---
+title: Update a Project in the CNCF Landscape
+---
+
+Project information like website URLs, graduation and incubation dates, and other crucial information about projects is maintained at [landscape.cncf.io](https://l.cncf.io).
+
+Updates to project entries can be submitted via [the CNCF Landscape GitHub repository](https://github.com/cncf/landscape/). 
+
+Note: It's (relatively) straightforward to update existing entries, but adding a new entry is less so. Please read the [guide provided in the repo](https://github.com/cncf/landscape/?tab=readme-ov-file#new-entries)