chore: update docs sponsors & broken links (#3877)

Signed-off-by: Gustavo Carvalho <gusfcarvalho@gmail.com>

README.md

@@ -64,9 +64,10 @@ You can find the roadmap in our documentation: https://external-secrets.io/main/
 
 ## Sponsored by
 
-![](assets/CS_logo_1.png)
-![](assets/form3_logo.png)
-![](assets/pento_logo.png)
+![External Secrets Inc.](assets/ESI_Logo.svg)
+![Container Solutions](assets/CS_logo_1.png)
+![Form 3](assets/form3_logo.png)
+![Pento ](assets/pento_logo.png)
 
 
 ## License

docs/index.md

@@ -1,3 +1,10 @@
+# [Sponsored by](https://opencollective.com/external-secrets-org)
+
+[![cs-logo](./pictures/cs_logo.png)](https://container-solutions.com)
+[![External Secrets inc.](./pictures/ESI_Logo.svg)](https://externalsecrets.com)
+[![Form3](./pictures/form3_logo.png)](https://www.form3.tech/)
+[![Pento](./pictures/pento_logo.png)](https://pento.io)
+
 # Introduction
 
 ![high-level](./pictures/diagrams-high-level-simple.png)
@@ -50,8 +57,3 @@ How to get involved:
 
 ![godaddy-logo](./pictures/godaddy_logo.png)
 
-### Sponsored by
-
-![cs-logo](./pictures/cs_logo.png)
-![Form3](./pictures/form3_logo.png)
-![Pento](./pictures/pento_logo.png)

hack/api-docs/mkdocs.yml

@@ -93,6 +93,7 @@ nav:
       - AWS Secrets Manager: provider/aws-secrets-manager.md
       - AWS Parameter Store: provider/aws-parameter-store.md
       - Azure Key Vault: provider/azure-key-vault.md
+      - BeyoundTrust: provider/beyondtrust.md
       - Bitwarden Secrets Manager: provider/bitwarden-secrets-manager.md
       - Chef: provider/chef.md
       - CyberArk Conjur: provider/conjur.md