Fix typo in timeseries documentation

[adamjstewart]

No description provided.

[jorisvandenbossche]

@adamjstewart Thanks!

[codecov-io]

Codecov Report

Merging #15666 into master will decrease coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #15666      +/-   ##
==========================================
- Coverage   91.03%   91.01%   -0.03%     
==========================================
  Files         143      143              
  Lines       49382    49382              
==========================================
- Hits        44956    44946      -10     
- Misses       4426     4436      +10

Impacted Files	Coverage Δ
pandas/io/gbq.py	25% <0%> (-58.34%)	❌
pandas/tools/merge.py	93.61% <0%> (-0.34%)	❌
pandas/core/frame.py	97.87% <0%> (-0.1%)	❌
pandas/core/common.py	91.3% <0%> (+0.33%)	✅

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update e0b37f9...2f9ff2a. Read the comment docs.