chore: update go to 1.24.2 (#17356)

this updates `go` to the latest stable patch version `1.24.2` in:
- `go.mod`
- `dogfood/coder/Dockerfile`
- `.github/actions/setup-go/action.yaml`
- `flake.nix`

written with the assistance of ClaudeCode.

---------

Co-authored-by: Thomas Kosiewski <tk@coder.com>

.github/actions/setup-go/action.yaml

@@ -4,7 +4,7 @@ description: |
 inputs:
   version:
     description: "The Go version to use."
-    default: "1.24.1"
+    default: "1.24.2"
 runs:
   using: "composite"
   steps:

dogfood/coder/Dockerfile

@@ -9,7 +9,7 @@ RUN cargo install typos-cli watchexec-cli && \
 FROM ubuntu:jammy@sha256:0e5e4a57c2499249aafc3b40fcd541e9a456aab7296681a3994d631587203f97 AS go
 
 # Install Go manually, so that we can control the version
-ARG GO_VERSION=1.24.1
+ARG GO_VERSION=1.24.2
 
 # Boring Go is needed to build FIPS-compliant binaries.
 RUN apt-get update && \

flake.nix

@@ -130,7 +130,7 @@
             gnused
             gnugrep
             gnutar
-            go_1_22
+            unstablePkgs.go_1_24
             go-migrate
             (pinnedPkgs.golangci-lint)
             gopls
@@ -196,7 +196,7 @@
         # slim bundle into it's own derivation.
         buildFat =
           osArch:
-          pkgs.buildGo122Module {
+          unstablePkgs.buildGo124Module {
             name = "coder-${osArch}";
             # Updated with ./scripts/update-flake.sh`.
             # This should be updated whenever go.mod changes!

go.mod

@@ -1,6 +1,6 @@
 module github.com/coder/coder/v2
 
-go 1.24.1
+go 1.24.2
 
 // Required until a v3 of chroma is created to lazily initialize all XML files.
 // None of our dependencies seem to use the registries anyways, so this