chore: Update golangci-lint version and configuration

- Update the `golangci-lint-action` in `.github/workflows/ci.yml` to use `v2.6.2`.
- Update the `version` field in `.golangci.yml` to `"2"`.
- Rescope `issues.exclude-rules` to `exclusions.rules` in `.golangci.yml` for newer versions.
- Update the `golangci-lint` version in `.mise.toml` to `2.6.2`.

Author: osteele

.github/workflows/ci.yml

@@ -53,7 +53,7 @@ jobs:
     - name: golangci-lint
       uses: golangci/golangci-lint-action@v6
       with:
-        version: latest
+        version: v2.6.2
         args: --timeout=5m
 
   build-cross-platform:

.golangci.yml

@@ -1,5 +1,4 @@
-# golangci-lint configuration v2
-version: 2
+version: "2"
 
 run:
   timeout: 5m
@@ -9,13 +8,13 @@ linters:
     - unused    # Disabled due to restructuring - some runner types may appear unused
     - errcheck  # Too noisy for test files - use go vet instead
 
-issues:
-  exclude-rules:
-    # Exclude specific issues in internal/runners.go
-    - path: internal/runners.go
-      linters:
-        - unused
-    # Don't require error checking in test files
-    - path: _test\.go
-      linters:
-        - errcheck
+  exclusions:
+    rules:
+      # Exclude specific issues in internal/runners.go
+      - path: internal/runners.go
+        linters:
+          - unused
+      # Don't require error checking in test files
+      - path: _test\.go
+        linters:
+          - errcheck

.mise.toml

@@ -1,6 +1,6 @@
 [tools]
 go = "1.25"
-golangci-lint = "2"
+golangci-lint = "2.6.2"
 lefthook = "1"
 
 [tasks.format]