Update Go to 1.27.3

.github/copilot-instructions.md

@@ -31,7 +31,7 @@ For project-specific context, also consult:
 
 ## Project Shape
 
-- Language: Go module `embed-code/embed-code-go`, with Go `1.26.4` declared in
+- Language: Go module `embed-code/embed-code-go`, with Go `1.27.3` declared in
   the root [`go.mod`](../go.mod) file.
 - Entry point: [`main.go`](../main.go), including mode dispatch, aggregate
   errors, version embedding from [`VERSION`](../VERSION), and final
@@ -205,7 +205,7 @@ go run ./main.go -mode=check -config-path=showcase/embedding/embed-code.yml
 ```
 
 Linting is configured by [`.golangci.yml`](../.golangci.yml) and CI uses
-`golangci-lint-action` version `v8` with `golangci-lint` version `v2.12.2`.
+`golangci-lint-action` version `v8` with `golangci-lint` version `v2.15.0`.
 Run the local equivalent only when available:
 
 ```bash

.github/workflows/check.yml

@@ -24,7 +24,7 @@ jobs:
       - name: Run linter
         uses: golangci/golangci-lint-action@v8
         with:
-          version: v2.12.2
+          version: v2.15.0
           args: ./...
 
       - name: Run Tests

.golangci.yml

@@ -1,7 +1,7 @@
 # This file holds the configs for the linters, and it should be placed in the current working directory.
 version: "2"
 run:
-  go: 1.22.1
+  go: 1.27.3
   modules-download-mode: readonly
   tests: true
   allow-parallel-runners: true

README.md

@@ -102,7 +102,7 @@ You do not need to install Go to use a release binary.
 ## Build From Source
 
 Using Embed Code does not require Go.
-To build the application from this repository, install Go `1.26.4` and run:
+To build the application from this repository, install Go `1.27.3` and run:
 
 ```bash
 go build -trimpath -o embed-code main.go

VERSION

@@ -1 +1 @@
-1.2.5
+1.2.6

go.mod

@@ -24,7 +24,7 @@
 
 module embed-code/embed-code-go
 
-go 1.26.4
+go 1.27.3
 
 require (
 	github.com/bmatcuk/doublestar/v4 v4.6.1