go.mod: upgrade to 1.23.9

.github/workflows/gobump.yml

@@ -17,6 +17,6 @@ jobs:
       - name: Run gobump-deps action
         uses: lzap/gobump@main
         with:
-          go_version: "1.22.8"
+          go_version: "1.23.9"
           token: ${{ secrets.GITHUB_TOKEN }}
           exec_pr: ./tools/prepare-source.sh

.github/workflows/tests.yml

@@ -71,7 +71,7 @@ jobs:
     - uses: actions/checkout@v4
     - uses: actions/setup-go@v5
       with:
-        go-version: "1.22"
+        go-version: "1.23"
     - env:
         PGUSER: postgres
         PGPASSWORD: foobar
@@ -106,10 +106,10 @@ jobs:
     name: "⌨ Golang Lint"
     runs-on: ubuntu-22.04
     steps:
-      - name: Set up Go 1.22
+      - name: Set up Go 1.23
         uses: actions/setup-go@v5
         with:
-          go-version: "1.22"
+          go-version: "1.23"
         id: go
 
       - name: Check out code into the Go module directory
@@ -154,10 +154,10 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
 
-      - name: Set up Go 1.22
+      - name: Set up Go 1.23
         uses: actions/setup-go@v5
         with:
-          go-version: "1.22"
+          go-version: "1.23"
         id: go
 
       - name: Check out code into the Go module directory