chore(deps): update jdx/mise-action action to v4

Author: renovate[bot]

.github/workflows/main.yml

@@ -26,7 +26,7 @@ jobs:
           cache: true
 
       - name: Install mise & tools
-        uses: jdx/mise-action@v3
+        uses: jdx/mise-action@v4
 
       - name: Cache Go tools
         id: go-tools-cache

.github/workflows/pr-checks.yml

@@ -26,7 +26,7 @@ jobs:
           cache: true
 
       - name: Install mise & tools
-        uses: jdx/mise-action@v3
+        uses: jdx/mise-action@v4
 
       - name: Cache Go tools
         id: go-tools-cache