docs/hardware: fix up page headers

the div tag was missing or page titles were missing

Signed-off-by: Leah Rowe <leah@libreboot.org>

site/docs/hardware/d510mo.md

@@ -4,7 +4,7 @@ title: Intel D510MO and D410PT desktop boards
 
 <div class="specs">
 <center>
-![Intel D510MO]()
+Intel D510MO
 </center>
 
 | ***Specifications***       |                                                |

site/docs/hardware/ga-g41m-es2l.md

@@ -4,7 +4,7 @@ title: Gigabyte GA-G41M-ES2L desktop board
 
 <div class="specs">
 <center>
-![GA-G41M-ES2L]()
+GA-G41M-ES2L
 </center>
 
 | ***Specifications***       |                                                |

site/docs/hardware/hp2570p.md

@@ -7,6 +7,10 @@ x-toc-enable: true
 OR YOU MIGHT BRICK YOUR MACHINE: [SAFETY PRECAUTIONS](../../news/safety.md)**
 
 <div class="specs">
+<center>
+HP EliteBook 2570p
+</center>
+
 | ***Specifications***      |                                   |
 |---------------------------|-----------------------------------|
 | **Manufacturer**          | HP                                |

site/docs/hardware/hp8460p.md

@@ -6,6 +6,11 @@ x-toc-enable: true
 **[PLEASE READ THESE INSTRUCTIONS BEFORE INSTALLING](../../news/safety.md),
 OR YOU MIGHT BRICK YOUR MACHINE: [SAFETY PRECAUTIONS](../../news/safety.md)**
 
+<div class="specs">
+<center>
+HP EliteBook 8460p
+</center>
+
 | ***Specifications***       |                                                |
 |----------------------------|------------------------------------------------|
 | **Manufacturer**           | HP                                             |

site/docs/hardware/imac52.md

@@ -4,7 +4,7 @@ title: Apple iMac 5,2
 
 <div class="specs">
 <center>
-![iMac5,2]()
+iMac5,2
 </center>
 
 | ***Specifications***       |                                                |