Update README.md - add alt for img

README.md

@@ -14,7 +14,7 @@ Buddy plugin provides a set of useful features and techniques that will help you
 through twisted code dependencies. At the same time, it gives you a better understanding of the code
 structure in your codebase.
 
-<img src="assets/gifs/Intro.gif" width="920" height="509"/>
+<img src="assets/gifs/Intro.gif" width="920" height="509" alt="Graph Buddy introduction"/>
 
 ---
 
@@ -120,15 +120,15 @@ accordingly, showcasing semantics info about your project.
 
 Look for a 'Graph Buddy' tab in the bottom right corner and press it.
 
-<img src="assets/gifs/IntelliJ-open-plugin.gif" width="800" height="500"/>
+<img src="assets/gifs/IntelliJ-open-plugin.gif" width="800" height="500" alt="Graph Buddy plugin in IntelliJ" />
 
 ### VSCode
 
 Click the `Graph Buddy` icon in the activity bar (left), then press the `Open Graph Buddy window`
 button. It will open the Graph Buddy board; just wait for the reindexing process to finish and start
 browsing!
 
-<img src="assets/gifs/VSCode-open-plugin.gif" width="800" height="500"/>
+<img src="assets/gifs/VSCode-open-plugin.gif" width="800" height="500" alt="Graph Buddy plugin in VSCode" />
 
 ### Indexing the graph
 
@@ -143,19 +143,19 @@ To reindex graph manually:
 
 **NOTE: The plugin is optimised for working in the default, 2D mode. Some features may not correctly (or even at all) in 3D mode.**
 
-<img src="assets/gifs/IntelliJ-0.gif" width="920" height="600"/>
+<img src="assets/gifs/IntelliJ-0.gif" width="920" height="600" alt="GraphBuddy 2D board and interactive visualization" />
 
 ### Adding nodes to the graph
 
 You can do this in multiple ways. The most intuitive is clicking on the code - then the corresponding node should appear on plugin canvas.
 
 The second way is using options from the context menu in the editor or on canvas. In the editor, there are some options to generate the whole graph for a selected place in the code.
 
-<img src="assets/gifs/IntelliJ-1.gif" width="920" height="600"/>
+<img src="assets/gifs/IntelliJ-1.gif" width="920" height="600" alt="Graph Buddy board - adding nodes to the board" />
 
 You can check where a given node is called using node context actions Called by & Call hierarchy. You can also find paths between nodes already added to the graph.
 
-<img src="assets/gifs/IntelliJ-2.gif" width="920" height="600"/>
+<img src="assets/gifs/IntelliJ-2.gif" width="920" height="600" />
 
 ### Filters, layouts, search