7.3 Base Guide - updates to Chapters 8 and 9

Hello everybody,

I have placed two updated files in the relevant NextCloud folder:

* BG7308-DatabaseTasks_SF_23Jan2022.odt
 * BG7209-Macros_SF_24Jan2022.odt

These two files are now in the 7.3 template, include captions for figures and tables, and have a little less negativity in the text (e.g., less use of the word "unfortunately"; etc).

Chapters 8 and 9 are not scheduled for significant updates at this issue. Please could somebody review the figure / table captions, and any other tracked changes in these two to make sure I haven’t done anything stupid?