get rid of warnings for invalid escape sequenes

[adam-huganir]

python is weird about escape sequences and tries to guess what you mean and throws a warning. in this case escaping the \ probably makes the most sense as it doesnt have any side affects (vs using r"some\ string"). the warnings always bug me so i try to fix them when i can

quick sanity check:

>>> "this is a\ test" == "this is a\\ test"
<stdin>:1: SyntaxWarning: invalid escape sequence '\ '
True

Original error from my terminal logs:

~/Code/etc %> pebble sdk install latest
/home/adam/.local/share/uv/tools/pebble-tool/lib/python3.13/site-packages/libpebble2/protocol/base/__init__.py:78: SyntaxWarning: invalid escape sequence '\*'
  """
/home/adam/.local/share/uv/tools/pebble-tool/lib/python3.13/site-packages/libpebble2/protocol/base/types.py:178: SyntaxWarning: invalid escape sequence '\ '
  """
/home/adam/.local/share/uv/tools/pebble-tool/lib/python3.13/site-packages/libpebble2/protocol/base/types.py:426: SyntaxWarning: invalid escape sequence '\ '
  """
/home/adam/.local/share/uv/tools/pebble-tool/lib/python3.13/site-packages/libpebble2/protocol/base/types.py:481: SyntaxWarning: invalid escape sequence '\ '
  """
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