github actions, go.mod: use Go 1.22 instead of the unsupported 1.19

Author: maelvls

.github/workflows/release-master.yml

@@ -11,15 +11,15 @@ jobs:
   vet:
     name: vet
     runs-on: ubuntu-22.04
-    container: golang:1.19
+    container: golang:1.22
     steps:
     - uses: actions/checkout@v4
     - run: make vet
       shell: bash
   test:
     name: go test
     runs-on: ubuntu-22.04
-    container: golang:1.19
+    container: golang:1.22
     steps:
     - uses: actions/checkout@v4
     - run: make test

.github/workflows/test.yml

@@ -13,15 +13,15 @@ jobs:
   vet:
     name: vet
     runs-on: ubuntu-22.04
-    container: golang:1.19
+    container: golang:1.22
     steps:
     - uses: actions/checkout@v4
     - run: make vet
       shell: bash
   test:
     name: go test
     runs-on: ubuntu-22.04
-    container: golang:1.19
+    container: golang:1.22
     steps:
     - uses: actions/checkout@v4
     - run: make test

go.mod

@@ -2,8 +2,6 @@ module github.com/jetstack/preflight
 
 go 1.22.0
 
-toolchain go1.22.6
-
 require (
 	github.com/Jeffail/gabs/v2 v2.7.0
 	github.com/cenkalti/backoff v2.2.1+incompatible