Replace CSS class with td align, since GitHub markdown does not seem …

…to allow a style tag

README.md

@@ -116,7 +116,6 @@ must run Alteza with trusted code, or in an isolated container. For example, in
        * Directories containing index files should just be referred to by the directory name. For example, the index page `about-me/hobbies/index.md` (or `about-me/hobbies/index.py.html`) should just be linked to with a `link('hobbies')`.
 
 12. **Built-in Functions and Fields**
-    <style>.tdc {text-align: center;}</style>
     <table>
 <tr>
 <th rowspan="2">Built-in</th>
@@ -132,38 +131,38 @@ must run Alteza with trusted code, or in an isolated container. For example, in
 <tr>
 <td><code>link</code></td>
 <td>...</td>
-<td class="tdc">✅</td><td class="tdc">✅</td><td class="tdc">❌</td><td class="tdc">✅</td>
+<td align="center">✅</td><td align="center">✅</td><td align="center">❌</td><td align="center">✅</td>
 </tr>
 <tr>
 <td><code>path</code></td>
 <td>...</td>
-<td class="tdc">✅</td><td class="tdc">✅</td><td class="tdc">✅</td><td class="tdc">✅</td>
+<td align="center">✅</td><td align="center">✅</td><td align="center">✅</td><td align="center">✅</td>
 </tr>
 <tr>
 <td><code>dir</code></td>
 <td>...</td>
-<td class="tdc">✅</td><td class="tdc">✅</td><td class="tdc">✅</td><td class="tdc">✅</td>
+<td align="center">✅</td><td align="center">✅</td><td align="center">✅</td><td align="center">✅</td>
 </tr>
 <tr>
 <td>Modified Date</td>
 <td>...</td>
-<td class="tdc">✅</td><td class="tdc">✅</td><td class="tdc">✅</td><td class="tdc">✅</td>
+<td align="center">✅</td><td align="center">✅</td><td align="center">✅</td><td align="center">✅</td>
 </tr>
 <tr>
 <td>Idea Date</td>
 <td>...</td>
-<td class="tdc">✅</td><td class="tdc">✅</td><td class="tdc">✅</td><td class="tdc">✅</td>
+<td align="center">✅</td><td align="center">✅</td><td align="center">✅</td><td align="center">✅</td>
 </tr>
 <tr>
 <td>Title</td>
 <td>The title is either the <code>title</code> YAML field, or if that isn't defined, the <code>.realName</code> of the file, which is the adjusted name of the file without its extension and a date prefix (if present) removed. The title isn't <em>properly</em> available to Python inside the page itself, or from <code>__config__.py</code>, since the page has not been processed when these are executed. If <code>.page</code> is accessed from these (the page or config), or if a <code>title</code> was never defined in the page, then the <code>.realName</code> of the file would be returned.
 </td>
-<td class="tdc">❌</td><td class="tdc">✅</td><td class="tdc">❌</td><td class="tdc">✅</td>
+<td align="center">❌</td><td align="center">✅</td><td align="center">❌</td><td align="center">✅</td>
 </tr>
 <tr>
 <td>YAML fields & other vars</td>
 <td>...</td>
-<td class="tdc">❌</td><td class="tdc">✅</td><td class="tdc">❌</td><td class="tdc">✅</td>
+<td align="center">❌</td><td align="center">✅</td><td align="center">❌</td><td align="center">✅</td>
 </tr>
 <tr>
 <td><code>readfile</code></td>
@@ -176,15 +175,15 @@ def readfile(file_path: str) -> str:
 ```
 
 </td>
-<td class="tdc">✅</td><td class="tdc">✅</td><td class="tdc">✅</td><td class="tdc">✅</td>
+<td align="center">✅</td><td align="center">✅</td><td align="center">✅</td><td align="center">✅</td>
 </tr>
 <tr>
 <td><code>sh</code></td>
 <td>This exposes entire sh library. The current working directory (CWD) would be wherever the file being executed is located (regardless of whether the file is a regular page or index page or `__config__.py`, etc). If the file is a template, the CWD would be that of the page being processed.
 
 See `sh`'s documentation here: https://sh.readthedocs.io/en/latest/
 </td>
-<td class="tdc">✅</td><td class="tdc">✅</td><td class="tdc">✅</td><td class="tdc">✅</td>
+<td align="center">✅</td><td align="center">✅</td><td align="center">✅</td><td align="center">✅</td>
 </tr>
 </table>