Improve README.md accessibility for screen readers (#995)

* Improve README.md accessibility for screen readers

1. The "issue" and "pull request" badges are removed because they're obvious that you can already see the counters on GitHub.
2. Add width for the remaining badges. https://web.dev/optimize-cls/#images-without-dimensions
3. Improve alt texts of the badges (the alt texts on ## Screenshots is still not worked on yet)
4. Add height = '353' for the screenshots

* Remove some unnecessary trailing slashes on `img` elements README.md

See https://github.com/validator/validator/wiki/Markup-%C2%BB-Void-elements

---------

Co-authored-by: throwawayaccountfor <121148372+throwawayaccountfor@users.noreply.github.com>

README.md

@@ -6,30 +6,24 @@
         src = '/assets/icon.png' 
         height = '100' 
         width = '100' 
-        alt = 'Icon' 
-    />
+        alt = '' 
+    >
     <br>
     YouTube Spammer Purge
     <br>
 </h1>
 
 <!---------------------------------[ Badges ]---------------------------------->
 
-<div align = 'center'>
-    <a href = 'https://github.com/ThioJoe/YT-Spammer-Purge/issues'>
-        <img src = 'https://img.shields.io/github/issues/ThioJoe/YT-Spammer-Purge'/>
-    </a>
-    <a href = 'https://github.com/ThioJoe/YT-Spammer-Purge/pulls'>
-        <img src = 'https://img.shields.io/github/issues-pr/ThioJoe/YT-Spammer-Purge'/>
-    </a>
+<div align = 'center'>   
     <a href = 'https://github.com/ThioJoe/YT-Spammer-Purge/releases'>
-        <img src = 'https://img.shields.io/github/v/release/ThioJoe/YT-Spammer-Purge?include_prereleases&label=Latest%20Release'/>
+        <img src = 'https://img.shields.io/github/v/release/ThioJoe/YT-Spammer-Purge?include_prereleases&label=Latest%20Release' height = '20' alt = 'Latest Release'>
     </a>
     <a href = 'https://github.com/ThioJoe/YT-Spammer-Purge/actions/workflows/codeql-analysis.yml'>
-        <img src = 'https://github.com/ThioJoe/YT-Spammer-Purge/actions/workflows/codeql-analysis.yml/badge.svg'/>
+        <img src = 'https://github.com/ThioJoe/YT-Spammer-Purge/actions/workflows/codeql-analysis.yml/badge.svg' height = '20' alt = 'CodeQL'>
     </a>
     <a href = 'https://github.com/ThioJoe/YT-Spammer-Purge/actions/workflows/docker-build.yml'>
-        <img src = 'https://github.com/ThioJoe/YT-Spammer-Purge/actions/workflows/docker-build.yml/badge.svg'/>
+        <img src = 'https://github.com/ThioJoe/YT-Spammer-Purge/actions/workflows/docker-build.yml/badge.svg' height = '20' alt = 'docker-build'>
     </a>
 </div>
 
@@ -116,27 +110,31 @@ Read some additional details about 'moderator mode' on the [wiki page here][Mode
     <h2>Filter Mode Selection</h2>
     <br>
     <img 
-        width = '675' 
+         height = '353'
+         width = '675' 
         alt = 'Filter Mode Selection' 
         src = 'https://user-images.githubusercontent.com/93459510/174273476-5af0a1ad-9ca1-4fea-976d-e731ce336922.png'>
     <br>
     <h2>Scanning<br>(Auto Smart Mode)</h2>
     <br>
     <img 
+        height = '353'
         width = '675' 
         alt = 'Scanning (Auto Smart Mode)' 
         src = 'https://user-images.githubusercontent.com/93459510/174273577-38e51d30-f313-4053-ba31-bb2724770dda.png'>
     <br>
     <h2>Matched Comments List</h2>
     <br>
     <img 
+        height = '353'
         width = '675' 
         alt = 'Matched Comments List' 
         src = 'https://user-images.githubusercontent.com/93459510/174273656-0fb22382-ec88-4e63-88f3-e4a93ac1f1ad.png'>
     <br>
     <h2>Match Samples and Deletion Menu</h2>
     <br>
     <img 
+        height = '353'
         width = '675' 
         alt = 'Match Samples and Deletion Menu' 
         src = 'https://user-images.githubusercontent.com/93459510/174273744-3d5a174a-904a-493e-af37-bcca44c57820.png'>
@@ -168,8 +166,7 @@ bash <(curl -s https://raw.githubusercontent.com/ThioJoe/YT-Spammer-Purge/main/i
 
 <img 
     width = '500'
-    src = 'https://user-images.githubusercontent.com/60006481/154855672-165565a1-50db-47d4-bf39-0fb576710f63.gif'
-/>
+    src = 'https://user-images.githubusercontent.com/60006481/154855672-165565a1-50db-47d4-bf39-0fb576710f63.gif'>
 
 See one of the following if you need further help:
 * [Linux Setup Instructions][Instructions Linux]
@@ -181,8 +178,7 @@ To update YTSpammerPurge, run the `install.sh` file inside your installation.
 
 <img 
     width = '500'
-    src = 'https://user-images.githubusercontent.com/60006481/154855673-bf2e8fdb-eaa3-4583-a2a1-80ef4816e2bc.gif' 
-/>
+    src = 'https://user-images.githubusercontent.com/60006481/154855673-bf2e8fdb-eaa3-4583-a2a1-80ef4816e2bc.gif'>
 
 ##### Manual Installation