v4 self-hosting docs updates (#2202)

* quote version strings

* Update architecture diagram to include kubernetes

---------

Co-authored-by: James Ritchie <james@trigger.dev>

Author: nicktrn

docs/self-hosting/architecture.png

@@ -58,7 +58,7 @@ webapp:
 ```bash
 helm upgrade -n trigger --install trigger \
   oci://ghcr.io/triggerdotdev/charts/trigger \
-  --version ~4.0.0-beta \
+  --version "~4.0.0-beta" \
   --create-namespace
 ```
 
@@ -106,11 +106,11 @@ The following commands will display the default values:
 ```bash
 # Specific version
 helm show values oci://ghcr.io/triggerdotdev/charts/trigger \
-  --version 4.0.0-beta.5
+  --version "4.0.0-beta.5"
 
 # Latest v4 beta
 helm show values oci://ghcr.io/triggerdotdev/charts/trigger \
-  --version ~4.0.0-beta
+  --version "~4.0.0-beta"
 ```
 
 ### Custom values
@@ -170,7 +170,7 @@ Deploy with your custom values:
 ```bash
 helm upgrade -n trigger --install trigger \
   oci://ghcr.io/triggerdotdev/charts/trigger \
-  --version ~4.0.0-beta \
+  --version "~4.0.0-beta" \
   --create-namespace \
   -f values-custom.yaml
 ```
@@ -343,14 +343,14 @@ You can lock versions in two ways:
 # Pin to a specific version for production
 helm upgrade -n trigger --install trigger \
   oci://ghcr.io/triggerdotdev/charts/trigger \
-  --version 4.0.0-beta.5
+  --version "4.0.0-beta.5"
 
 # The app version will be different from the chart version
 # This is the version of the Trigger.dev webapp and supervisor
 # ..and should always match your Trigger.dev CLI version
 helm show chart \
   oci://ghcr.io/triggerdotdev/charts/trigger \
-  --version 4.0.0-beta.5 | grep appVersion
+  --version "4.0.0-beta.5" | grep appVersion
 ```
 
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