Fix link

[jonaskello]

The graphql plugin link was pointing to hapi plugin

Which problem is this PR solving?

• Wrong link

Short description of the changes

• Corrected link

[linux-foundation-easycla]

The committers are authorized under a signed CLA.

• ✅ Jonas Kello (35dd07c)

[codecov]

Codecov Report

Merging #322 (35dd07c) into master (49e3a59) will increase coverage by 1.21%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #322      +/-   ##
==========================================
+ Coverage   94.20%   95.41%   +1.21%     
==========================================
  Files          18      115      +97     
  Lines         777     6090    +5313     
  Branches      125      590     +465     
==========================================
+ Hits          732     5811    +5079     
- Misses         45      279     +234     

Impacted Files	Coverage Δ
...emetry-koa-instrumentation/test/koa-router.test.ts	99.11% <0.00%> (ø)
node/opentelemetry-plugin-dns/.eslintrc.js	0.00% <0.00%> (ø)
node/opentelemetry-plugin-mysql/src/utils.ts	100.00% <0.00%> (ø)
node/opentelemetry-plugin-mongodb/.eslintrc.js	0.00% <0.00%> (ø)
node/opentelemetry-plugin-dns/src/version.ts	100.00% <0.00%> (ø)
...opentelemetry-koa-instrumentation/test/koa.test.ts	99.31% <0.00%> (ø)
plugins/node/opentelemetry-plugin-pg/src/pg.ts	91.52% <0.00%> (ø)
...entelemetry-instrumentation-graphql/test/schema.ts	55.84% <0.00%> (ø)
node/opentelemetry-plugin-mysql/src/mysql.ts	95.57% <0.00%> (ø)
node/opentelemetry-plugin-redis/src/redis.ts	100.00% <0.00%> (ø)
... and 87 more