chore(jenkins): Update Jenkins plugins (#1612)

Author: gounthar

dockerfiles/plugins.txt

@@ -46,7 +46,7 @@ okhttp-api:4.12.0-195.vc02552c04ffd
 pipeline-build-step:571.v08a_fffd4b_0ce
 pipeline-graph-analysis:245.v88f03631a_b_21
 pipeline-graph-view:646.va_da_a_047edca_c
-pipeline-groovy-lib:763.v13008816b_de7
+pipeline-groovy-lib:766.v2b_e08c2e6ff2
 pipeline-input-step:534.v352f0a_e98918
 pipeline-milestone-step:138.v78ca_76831a_43
 pipeline-model-api:2.2273.v643f36ed9e94