fix: migrate to golangci-lint v2

Author: pranc1ngpegasus

src/main.ts

@@ -58,9 +58,19 @@ async function run(): Promise<void> {
     }
 
     const output = await core.group("Running golangci-lint ...", async (): Promise<exec.ExecOutput> => {
+      const versionNumber = golangciLintVersion.match(/^v?(\d+)/);
+      if (!versionNumber) {
+        throw new Error(`Invalid golangci-lint version: ${golangciLintVersion}`);
+      }
+      const isV1 = parseInt(versionNumber[1], 10) === 1;
+
+      const options = isV1
+        ? ["run", "--out-format", "line-number", ...flags.parse(golangciLintFlags)]
+        : ["run", "--output.text.path", "stdout", ...flags.parse(golangciLintFlags)];
+
       return await exec.getExecOutput(
         golangci,
-        ["run", "--out-format", "line-number", ...flags.parse(golangciLintFlags)],
+        options,
         {
           cwd,
           ignoreReturnCode: true,