Remove docs page prefixes

- Remove getting-started- file name prefix
- Remove about- file name prefix
- Update code and links accordingly

Reported-by: @mjherzog
Signed-off-by: Philippe Ombredanne <pombredanne@aboutcode.org>

Author: pombredanne

website/docs/about/about-contribute.md website/docs/about/contribute.mdwebsite/docs/about/about-contribute.md renamed to website/docs/about/contribute.md

@@ -59,4 +59,4 @@ data exchange and trust. Uses PURL to reference packages.
 
 ---
 
-[Get started with CRA compliance and SBOMs...](../getting_started/getting_started-cravex.md)
+[Get started with CRA compliance and SBOMs...](../getting_started/cravex.md)

website/docs/about/about-credits.md website/docs/about/credits.mdwebsite/docs/about/about-credits.md renamed to website/docs/about/credits.md

@@ -48,4 +48,4 @@ The projects are presented in 5 categories:
 
 If you have questions about how to apply AboutCode building blocks to your
 requirements, please join one of our community meetings or on Gitter or Slack.
-See our [Meetings page](/docs/about/about-meetings) for details.
+See our [Meetings page](/docs/about/meetings) for details.