[code-infra] Update changelog script (@cherniavskii) (#16224)

Co-authored-by: Andrew Cherniavskii <[email protected]>

Author: github-actions[bot]

scripts/releaseChangelog.mjs

@@ -334,7 +334,7 @@ ${logTeamSection()}
 
 #### \`@mui/x-data-grid@__VERSION__\`
 
-${logChangelogSection(dataGridCommits) || `No changes since \`@mui/x-data-grid@${lastRelease}\`.`}
+${logChangelogSection(dataGridCommits) || 'Internal changes.'}
 
 #### \`@mui/x-data-grid-pro@__VERSION__\` [![pro](https://mui.com/r/x-pro-svg)](https://mui.com/r/x-pro-svg-link 'Pro plan')
 
@@ -352,7 +352,7 @@ ${logChangelogSection(dataGridPremiumCommits)}${dataGridPremiumCommits.length >
 
 #### \`@mui/x-date-pickers@__VERSION__\`
 
-${logChangelogSection(pickersCommits) || `No changes since \`@mui/x-date-pickers@${lastRelease}\`.`}
+${logChangelogSection(pickersCommits) || 'Internal changes.'}
 
 #### \`@mui/x-date-pickers-pro@__VERSION__\` [![pro](https://mui.com/r/x-pro-svg)](https://mui.com/r/x-pro-svg-link 'Pro plan')
 
@@ -364,7 +364,7 @@ ${logChangelogSection(pickersProCommits)}${pickersProCommits.length > 0 ? '\n' :
  
 #### \`@mui/x-charts@__VERSION__\`
 
-${logChangelogSection(chartsCommits) || `No changes since \`@mui/x-charts@${lastRelease}\`.`}
+${logChangelogSection(chartsCommits) || 'Internal changes.'}
 
 #### \`@mui/x-charts-pro@__VERSION__\` [![pro](https://mui.com/r/x-pro-svg)](https://mui.com/r/x-pro-svg-link 'Pro plan')
 
@@ -373,7 +373,7 @@ ${logChangelogSection(chartsProCommits)}${chartsProCommits.length > 0 ? '\n' : '
 ### Tree View
 
 #### \`@mui/x-tree-view@__VERSION__\` 
-${logChangelogSection(treeViewProCommits) || `No changes since \`@mui/x-tree-view-pro@${lastRelease}\`.`}
+${logChangelogSection(treeViewProCommits) || 'Internal changes.'}
 
 #### \`@mui/x-tree-view-pro@__VERSION__\` [![pro](https://mui.com/r/x-pro-svg)](https://mui.com/r/x-pro-svg-link 'Pro plan')