spelling fix

Author: bjuric

docs/04-dsl.mdx

@@ -5848,7 +5848,7 @@ Since [v4.8.0](https://github.com/gwen-interpreter/gwen-web/releases/tag/v4.8.0)
   ```gherkin
   "<filepath>" file should[ not] exist
   ```
-  <p>Assers that a file should exist (or not).</p>
+  <p>Asserts that a file should exist (or not).</p>
   </summary>
   <p>Where</p>
   <ul>
@@ -5876,7 +5876,7 @@ Since [v4.8.0](https://github.com/gwen-interpreter/gwen-web/releases/tag/v4.8.0)
   ```gherkin
   <filepathRef file> should[ not] exist
   ```
-  <p>Assers that a file should exist (or not).</p>
+  <p>Asserts that a file should exist (or not).</p>
   </summary>
   <p>Where</p>
   <ul>
@@ -5906,7 +5906,7 @@ Since [v4.8.0](https://github.com/gwen-interpreter/gwen-web/releases/tag/v4.8.0)
   ```gherkin
   "<filepath>" file should[ not] be empty
   ```
-  <p>Assers that a file should be empty (or not).</p>
+  <p>Asserts that a file should be empty (or not).</p>
   </summary>
   <p>Where</p>
   <ul>
@@ -5934,7 +5934,7 @@ Since [v4.8.0](https://github.com/gwen-interpreter/gwen-web/releases/tag/v4.8.0)
   ```gherkin
   <filepathRef file> should[ not] be empty
   ```
-  <p>Assers that a file should be empty (or not).</p>
+  <p>Asserts that a file should be empty (or not).</p>
   </summary>
   <p>Where</p>
   <ul>