fix: Correct remaining LaTeX errors for PDF compilation

- Replace \text{clumpSize} with \mathrm{clumpSize} (2 instances)
- Remove Chinese character 危险, replace with WARNING - DANGEROUS
- Fixes: Command \DH unavailable in encoding OT1
- Fixes: Unicode character errors

doc/latex/chapters/03-hfs-plus-specification.tex

@@ -231,12 +231,12 @@ xxd -s 1064 -l 4 -p volume.hfsplus
 
 \textbf{Recommended value}:
 \begin{equation}
-\text{clumpSize} = \text{blockSize} \times 4
+\mathrm{clumpSize} = \mathrm{blockSize} \times 4
 \end{equation}
 
 For 4 KB blocks:
 \begin{equation}
-\text{clumpSize} = 4096 \times 4 = 16384 \text{ bytes} = \texttt{0x00004000}
+\mathrm{clumpSize} = 4096 \times 4 = 16384~\mathrm{bytes} = \texttt{0x00004000}
 \end{equation}
 
 \textbf{Byte representation}:

doc/latex/chapters/06-mount-utilities.tex

@@ -147,7 +147,7 @@ mount -t hfsplus -o ro /dev/sdc1 /mnt/backup
 mount.hfs+ -o uid=1000,gid=1000,umask=022 /dev/sdd1 /mnt/data
 \end{verbatim}
 
-\textbf{Force mount dirty volume (危险)}:
+\textbf{Force mount dirty volume (WARNING - DANGEROUS)}:
 \begin{verbatim}
 mount.hfs+ -o force /dev/sde1 /mnt/recovery
 # WARNING: Can cause data corruption!