Updated actions/checkout version to (hopefully) include directory with a leading dot.

Author: Charles-Mahoudeau

.github/workflows/platformio-ci.yml

@@ -14,7 +14,7 @@ jobs:
 
         steps:
           - name: Checkout repository
-            uses: actions/checkout@v3
+            uses: actions/checkout@v4
 
           - name: Cache dependencies
             uses: actions/cache@v3
@@ -62,7 +62,7 @@ jobs:
 
         steps:
           - name: Checkout repository
-            uses: actions/checkout@v3
+            uses: actions/checkout@v4
 
           - name: Cache dependencies
             uses: actions/cache@v3
@@ -119,7 +119,7 @@ jobs:
 
         steps:
             - name: Checkout repository
-              uses: actions/checkout@v3
+              uses: actions/checkout@v4
 
             - name: Cache dependencies
               uses: actions/cache@v3
@@ -177,7 +177,7 @@ jobs:
 
         steps:
             - name: Checkout repository
-              uses: actions/checkout@v3
+              uses: actions/checkout@v4
 
             - name: Cache dependencies
               uses: actions/cache@v3