chore: Update bits syntax to use +<count>

packages/mermaid/src/docs/syntax/packet.md

@@ -19,14 +19,15 @@ start-end: "Block name" %% Multi-bit blocks
 
 ### Bits Syntax (v<MERMAID_RELEASE_VERSION>+)
 
-Using start and end bit counts can be difficult, especially when modifying a design. For this we add a bit count field, which starts from the end of the previous field automagically. Use `bit` or `bits` interchangeably to set the number of bits, thus:
+Using start and end bit counts can be difficult, especially when modifying a design. For this we add a bit count field, which starts from the end of the previous field automagically. Use `+<count>` to set the number of bits, thus:
 
-````md
+```md
 packet-beta
-1bit: "Block name" %% Single-bit block
-8bits: "Block name" %% 8-bit block
++1: "Block name" %% Single-bit block
++8: "Block name" %% 8-bit block
 9-15: "Manually set start and end, it's fine to mix and match"
 ... More Fields ...
+```
 
 ## Examples
 
@@ -35,8 +36,8 @@ packet-beta
 title: "TCP Packet"
 ---
 packet-beta
-16bits: "Source Port"
-16bits: "Destination Port"
+0-15: "Source Port"
+16-31: "Destination Port"
 32-63: "Sequence Number"
 64-95: "Acknowledgment Number"
 96-99: "Data Offset"
@@ -53,13 +54,12 @@ packet-beta
 160-191: "(Options and Padding)"
 192-255: "Data (variable length)"
 ```
-````
 
 ```mermaid-example
 packet-beta
 title UDP Packet
-0-15: "Source Port"
-16-31: "Destination Port"
++16: "Source Port"
++16: "Destination Port"
 32-47: "Length"
 48-63: "Checksum"
 64-95: "Data (variable length)"