fix(go): generated code runtime dependency version (#2399)

Fixes the version number of the jsii runtime module dependency in
generated go.mod files to not include the build number. This does it
the same way that python and dotnet are.

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

packages/jsii-pacmak/lib/targets/go/package.ts

@@ -221,7 +221,13 @@ export class RootPackage extends Package {
     code.line(`go ${GO_VERSION}`);
     code.line();
     code.open('require (');
-    code.line(`${JSII_RT_MODULE_NAME} v${this.assembly.jsiiVersion}`);
+    // Strip " (build abcdef)" from the jsii version
+    code.line(
+      `${JSII_RT_MODULE_NAME} v${this.assembly.jsiiVersion.replace(
+        / .*$/,
+        '',
+      )}`,
+    );
     for (const dep of this.packageDependencies) {
       code.line(`${dep.goModuleName} v${dep.version}`);
     }