Update actions/setup-go to v5 (#1148)

## Changes

This silences the following warning as seen in action output:

> Node.js 16 actions are deprecated. Please update the following actions
to use Node.js 20: actions/setup-go@v4.

.github/workflows/push.yml

@@ -31,7 +31,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Setup Go
-        uses: actions/setup-go@v4
+        uses: actions/setup-go@v5
         with:
           go-version: 1.21.0
 
@@ -66,7 +66,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Setup Go
-        uses: actions/setup-go@v4
+        uses: actions/setup-go@v5
         with:
           go-version: 1.21.0
 

.github/workflows/release-snapshot.yml

@@ -19,7 +19,7 @@ jobs:
           fetch-tags: true
 
       - name: Setup Go
-        uses: actions/setup-go@v4
+        uses: actions/setup-go@v5
         with:
           go-version: 1.21.0
 

.github/workflows/release.yml

@@ -20,7 +20,7 @@ jobs:
           fetch-tags: true
 
       - name: Setup Go
-        uses: actions/setup-go@v4
+        uses: actions/setup-go@v5
         with:
           go-version: 1.21.0