chore: update MCPG_VERSION to 0.3.7 (#533)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: github-actions[bot]

src/compile/common.rs

@@ -1171,7 +1171,7 @@ pub fn generate_header_comment(input_path: &std::path::Path) -> String {
 /// Docker image and version for the MCP Gateway (gh-aw-mcpg).
 /// Update this when upgrading to a new MCPG release.
 /// See: https://github.com/github/gh-aw-mcpg/releases
-pub const MCPG_VERSION: &str = "0.3.6";
+pub const MCPG_VERSION: &str = "0.3.7";
 
 /// Docker image for the MCPG container.
 pub const MCPG_IMAGE: &str = "ghcr.io/github/gh-aw-mcpg";