chore: bump golangci-lint to v2.4.0 (#288)

Updates golangci-lint version references from v2.3.1 to v2.4.0.

Changes:
- README.md: Updated prerequisites documentation and installation
command

Note: The CI workflow file (.github/workflows/ci.yml) also needs
updating but requires additional permissions.

Fixes #287

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---------

Co-authored-by: claude[bot] <209825114+claude[bot]@users.noreply.github.com>
Co-authored-by: adam jones <[email protected]>

Author: domdomegg

.github/workflows/ci.yml

@@ -38,7 +38,7 @@ jobs:
 
     - name: Install golangci-lint
       run: |
-        curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v2.3.1
+        curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v2.4.0
 
     - name: Run lint
       run: make lint

README.md

@@ -39,9 +39,9 @@ The MCP Registry service provides a centralized repository for MCP server entrie
 - Docker (optional, but recommended for development)
 
 For development:
-- golangci-lint v2.3.1 - Install with:
+- golangci-lint v2.4.0 - Install with:
   ```bash
-  curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v2.3.1
+  curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v2.4.0
   ```
 
 ## Running