chore: update github urls

[dwsupplee]

No description provided.

[codecov]

Codecov Report

Merging #152 into master will increase coverage by 0.14%.
The diff coverage is n/a.

@@ Coverage Diff @@## master #152 +/- ##
============================================
+ Coverage 66.54% 66.68% +0.14% + Complexity 370 365 -5 
============================================
Files 34 34 Lines 1877 1870 -7 Branches 240 237 -3 ============================================
- Hits 1249 1247 -2 + Misses 526 521 -5 
Partials 102 102

Impacted Files	Coverage Δ	Complexity Δ
.../com/google/cloud/MonitoredResourceDescriptor.java	83.76% <0%> (-0.28%)	20% <0%> (-4%)
...a/com/google/cloud/testing/BaseEmulatorHelper.java	31.21% <0%> (-0.22%)	5% <0%> (ø)
...src/main/java/com/google/cloud/ServiceOptions.java	44.22% <0%> (+0.74%)	32% <0%> (-1%)	⬇️
...re/src/main/java/com/google/cloud/RetryHelper.java	53.84% <0%> (+3.84%)	2% <0%> (ø)	⬇️

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