CI: Bump various GitHub actions to latest versions

actions/cache@v3
actions/checkout@v3
actions/upload-artifact@v3
actions/setup-dotnet@v2
actions/setup-java@v3
actions/setup-python@v4
mymindstorm/setup-emsdk@v11

Also reset cache keys as we're going to cleanup all caches.

.github/workflows/linux_builds.yml

@@ -4,7 +4,7 @@ on: [push, pull_request]
 # Global Settings
 env:
   # Only used for the cache key. Increment version to force clean build.
-  GODOT_BASE_BRANCH: master-v2
+  GODOT_BASE_BRANCH: master
   SCONSFLAGS: verbose=yes warnings=extra werror=yes module_text_server_fb_enabled=yes
   DOTNET_NOLOGO: true
   DOTNET_CLI_TELEMETRY_OPTOUT: false
@@ -77,7 +77,7 @@ jobs:
             artifact: true
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Linux dependencies
         shell: bash
@@ -102,7 +102,7 @@ jobs:
         uses: ./.github/actions/godot-deps
 
       - name: Set up .NET Sdk
-        uses: actions/setup-dotnet@v1
+        uses: actions/setup-dotnet@v2
         if: ${{ matrix.build-mono }}
         with:
           dotnet-version: '6.0.x'
@@ -195,7 +195,7 @@ jobs:
       # Checkout godot-cpp
       - name: Checkout godot-cpp
         if: ${{ matrix.godot-cpp-test }}
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           repository: godotengine/godot-cpp
           submodules: 'recursive'