build.gradle: Improve jitpack workaround doc & fix hash

Author: Profpatsch

app/build.gradle

@@ -210,7 +210,7 @@ dependencies {
     // the corresponding commit hash, since JitPack sometimes deletes artifacts.
     // If there’s already a git hash, just add more of it to the end (or remove a letter)
     // to cause jitpack to regenerate the artifact.
-    implementation 'com.github.TeamNewPipe:NewPipeExtractor:9f83b385a'
+    implementation 'com.github.TeamNewPipe:NewPipeExtractor:0b99100dbddeca2f'
     implementation 'com.github.TeamNewPipe:NoNonsense-FilePicker:5.0.0'
 
 /** Checkstyle **/
@@ -296,7 +296,7 @@ dependencies {
     implementation "com.jakewharton.rxbinding4:rxbinding:4.0.0"
 
     // Date and time formatting
-    implementation "org.ocpsoft.prettytime:prettytime:5.0.8.Final"
+    implementation "org.ocpsoft.prettytime:prettytime:5.0.9.Final"
 
 /** Debugging **/
     // Memory leak detection