Update MCP usage guide Docker images (#1041)

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

docs/toolhive/guides-mcp/context7.mdx

@@ -100,7 +100,7 @@ metadata:
   name: context7
   namespace: toolhive-system
 spec:
-  image: ghcr.io/stacklok/dockyard/npx/context7:3.2.3
+  image: ghcr.io/stacklok/dockyard/npx/context7:3.2.4
   transport: stdio
   proxyPort: 8080
 ```

docs/toolhive/guides-mcp/github.mdx

@@ -129,7 +129,7 @@ metadata:
   name: github
   namespace: toolhive-system
 spec:
-  image: ghcr.io/github/github-mcp-server:v1.5.0
+  image: ghcr.io/github/github-mcp-server:v1.6.0
   transport: stdio
   proxyPort: 8080
   secrets:

docs/toolhive/guides-mcp/grafana.mdx

@@ -149,7 +149,7 @@ metadata:
   name: grafana
   namespace: toolhive-system
 spec:
-  image: docker.io/grafana/mcp-grafana:0.17.0
+  image: docker.io/grafana/mcp-grafana:0.17.2
   transport: streamable-http
   mcpPort: 8000
   proxyPort: 8080

docs/toolhive/guides-mcp/k8s.mdx

@@ -131,7 +131,7 @@ metadata:
   name: mkp
   namespace: toolhive-system
 spec:
-  image: ghcr.io/stackloklabs/mkp/server:0.4.2
+  image: ghcr.io/stackloklabs/mkp/server:0.4.3
   transport: streamable-http
   mcpPort: 8080
   proxyPort: 8080

docs/toolhive/guides-mcp/playwright.mdx

@@ -165,7 +165,7 @@ metadata:
   name: playwright
   namespace: toolhive-system
 spec:
-  image: mcr.microsoft.com/playwright/mcp:v0.0.77
+  image: mcr.microsoft.com/playwright/mcp:v0.0.78
   transport: streamable-http
   mcpPort: 8931
   proxyPort: 8080
@@ -202,7 +202,7 @@ metadata:
   name: playwright
   namespace: toolhive-system
 spec:
-  image: mcr.microsoft.com/playwright/mcp:v0.0.77
+  image: mcr.microsoft.com/playwright/mcp:v0.0.78
   transport: streamable-http
   mcpPort: 8931
   proxyPort: 8080
@@ -244,7 +244,7 @@ metadata:
   name: playwright
   namespace: toolhive-system
 spec:
-  image: mcr.microsoft.com/playwright/mcp:v0.0.77
+  image: mcr.microsoft.com/playwright/mcp:v0.0.78
   transport: streamable-http
   mcpPort: 8931
   proxyPort: 8080