Use actions/cache@v3 (#1033)

Based on https://github.com/actions/cache/blob/main/RELEASES.md I cannot find any BC breaks

Author: OskarStark

.github/workflows/coding-standards.yml

@@ -37,7 +37,7 @@ jobs:
           key: "extcache-v1"
 
       - name: Cache extensions
-        uses: actions/cache@v2
+        uses: actions/cache@v3
         with:
           path: ${{ steps.extcache.outputs.dir }}
           key: ${{ steps.extcache.outputs.key }}

.github/workflows/static-analysis.yml

@@ -37,7 +37,7 @@ jobs:
           key: "extcache-v1"
 
       - name: Cache extensions
-        uses: actions/cache@v2
+        uses: actions/cache@v3
         with:
           path: ${{ steps.extcache.outputs.dir }}
           key: ${{ steps.extcache.outputs.key }}

.github/workflows/tests.yml

@@ -81,7 +81,7 @@ jobs:
           key: "extcache-v1"
 
       - name: Cache extensions
-        uses: actions/cache@v2
+        uses: actions/cache@v3
         with:
           path: ${{ steps.extcache.outputs.dir }}
           key: ${{ steps.extcache.outputs.key }}