Remove capacity from JsonDocument's constructor

.github/ISSUE_TEMPLATE/bug_report.md

@@ -27,7 +27,7 @@ Here is the environment that I used:
 Here is a small snippet that reproduces the issue.
 
 ```c++
-JsonDocument doc(1024);
+JsonDocument doc;
 
 DeserializationError error = deserializeJson(doc, "{\"hello\":\"world\"}");
 

.github/ISSUE_TEMPLATE/help.md

@@ -28,7 +28,7 @@ Here is the environment that I'm using':
 Here is a small snippet that demonstrate the problem.
 
 ```c++
-JsonDocument doc(1024);
+JsonDocument doc;
 
 DeserializationError error = deserializeJson(doc, "{\"hello\":\"world\"}");
 

.github/workflows/ci.yml

@@ -484,7 +484,7 @@ jobs:
           g++ -x c++ - <<END
           #include "${{ steps.amalgamate.outputs.filename }}"
           int main() {
-            JsonDocument doc(300);
+            JsonDocument doc;
             deserializeJson(doc, "{}");
           }
           END
@@ -518,7 +518,7 @@ jobs:
           g++ -x c++ - <<END
           #include "${{ steps.amalgamate.outputs.filename }}"
           int main() {
-            ArduinoJson::JsonDocument doc(300);
+            ArduinoJson::JsonDocument doc;
             deserializeJson(doc, "{}");
           }
           END