Doc fixes 1.15 (#9180)

* Remove unit from value

* Create doc-fixes.yaml

* Rename doc-fixes.yaml to doc-fixes.yaml

Author: Nadine2016

changelog/v1.15.24/doc-fixes.yaml

@@ -0,0 +1,5 @@
+changelog:
+  - type: NON_USER_FACING
+    description: >- 
+      Backport of weekly doc fixes, such as typos, links, version bumps, and feedback raised in Slack.  
+      skipCI-kube-tests:true

docs/content/installation/advanced_configuration/multi-gw-deployment.md

@@ -88,7 +88,7 @@ gloo:
                 name: https
                 targetPort: 8443
             type: LoadBalancer
-      tcpKeepaliveTimeSeconds: 5s # send keep-alive probes after 5s to keep connection up
+      tcpKeepaliveTimeSeconds: 5 # send keep-alive probes after 5s to keep connection up
       gatewaySettings:
         customHttpsGateway: # using the default HTTPS Gateway
           virtualServiceSelector:
@@ -102,7 +102,7 @@ gloo:
         httpsPort: 443
         httpNodePort: 32080 # random port to be fixed in your private network
         type: NodePort
-      tcpKeepaliveTimeSeconds: 5s # send keep-alive probes after 5s to keep connection up
+      tcpKeepaliveTimeSeconds: 5 # send keep-alive probes after 5s to keep connection up
       gatewaySettings:
         customHttpGateway: # using the default HTTP Gateway
           virtualServiceSelector: